Printing apparatus to acquire print data and transmit a request to an external apparatus to close websocket communication when predetermined time period elapses

ABSTRACT

Disclosed are a printing method using websocket communication and a management method for a websocket communication channel. The printing method includes establishing, by a printing apparatus, a websocket channel for communicating with an external apparatus, requesting, by the printing apparatus, print data from the external apparatus through the websocket channel, determining, by the printing apparatus, whether a predetermined condition associated with an acquisition of the print data is satisfied in response to the request for the print data, and controlling, by the printing apparatus, a channel duration time of the websocket channel when the predetermined condition is satisfied.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean PatentApplication Nos. 10-2017-0074197, 10-2017-0074198, 10-2017-0074199 and10-2017-0074200, filed on Jun. 13, 2017, the disclosure of which isincorporated herein by reference in its entirety.

BACKGROUND 1. Field

The present disclosure relates to a printing method through acommunication channel and a management method for the communicationchannel, and more particularly, to a printing method of communicatingdata using a websocket communication channel and a management method forefficiently operating a websocket communication channel.

2. Discussion of Related Art

As the use of smart devices and the number of functions executable byapplications running on smart devices have increased, aspects ofelectronic commerce using smart devices have been diversified. Inparticular, as online transactions increase, some functions of apre-existing point of sale (POS) system are being replaced and executedby smart devices.

A POS system refers to a system in which a POS host, a POS printer, abarcode reader, a card reader, and so on that are organically connectedto each other to perform all data processing processes entailed in atypical transaction. In a conventional POS system, it is common forvarious apparatuses to be wired, integratedly installed at one point ina shop, and then used while being fixed. According to such aconventional POS system, when a large number of consumers want toperform a transaction or want to remotely request that a transaction beperformed, it is physically difficult to smoothly perform a transaction.

Thus, in order to solve problems of the conventional POS system and keeppace with the trend of increasing electronic commerce using smartphones,there is a need for a solution to replace some functions of a POS systemusing a smartphone and simplify the POS system. In particular, the roleof a platform for smartphones to handle data used in an existingconventional POS system is emerging.

Websocket communication, which is a communication protocol that supportsduplex asynchronous communication between apparatuses, may beeffectively used when rapid data transmission and reception are requiredbecause data can be simultaneously transmitted and received in realtime.

SUMMARY

The present disclosure is directed to providing a printing method,system, and apparatus using websocket communication.

The present disclosure is also directed to providing an efficientcommunication method, system, and apparatus that simultaneously performdata transmission and reception.

The present disclosure is also directed to providing a method, system,and apparatus for controlling an establishment state of a communicationchannel according to data communication to efficiently operate thecommunication channel.

The present disclosure is also directed to providing a method, system,and apparatus for controlling a peripheral apparatus, which is connectedto a printing apparatus, by using websocket communication.

The present disclosure is also directed to providing a method, system,and apparatus for distributing print data using websocket communication.

The objectives of the present disclosure are not limited to theaforementioned objectives, and other objectives which are not describedherein should be clearly understood by those skilled in the art from thefollowing detailed description and the accompanying drawings.

According to an aspect of the present disclosure, there is provided aprinting method using websocket communication, performed by a printingapparatus, the printing method including establishing a websocketcommunication channel for communicating with an external apparatus;requesting print data for printing to the external apparatus; acquiringthe print data from the external apparatus through the websocketcommunication channel in response to the requesting the print data; andperforming a printing operation on the basis of the acquired print data,wherein the print data is generated by the external apparatus andwritten in a format processible by the printing apparatus.

The requesting print data may include requesting the print data aftertransmitting state information of the printing apparatus in response tothe external apparatus requesting the state information.

The requesting print data may include transmitting state information ofthe printing apparatus, and the state information may indicate whetherit is possible for the printing apparatus to perform the printingoperation. The state information may include status information for atleast one requirement for performing a printing operation. The stateinformation may indicate whether or not at least one requirement forperforming the printing operation is satisfied.

The format processible by the printing apparatus may be a format that isprocessible by the printing apparatus without a format conversionprocedure. The format processible by the printing apparatus may be acommand format that is specific to the printing apparatus to control theprinting apparatus.

According to another aspect of the present disclosure, there is a methodof managing a websocket communication channel, performed by a printingapparatus the method including establishing a websocket communicationchannel for communicating with an external apparatus; requesting printdata for printing operation to the external apparatus through thewebsocket communication channel; determining whether a predeterminedcondition associated with an acquisition of the print data is satisfiedin response to the request for the print data; and controlling a channelduration time of the websocket communication channel when thepredetermined condition is satisfied.

The determining of whether a predetermined condition is satisfied mayinclude determining whether the print data requested to be transmittedis received from the external apparatus. The determining of whether apredetermined condition is satisfied may include determining whether apredetermined time period has elapsed after the print data is requestedand may further include determining whether the print data is received.

The controlling of a channel duration time of the websocketcommunication channel may include interrupting the websocketcommunication channel within a predetermined time period after thepredetermined condition is satisfied.

The controlling of a channel duration time of the websocketcommunication channel when the predetermined condition is satisfied mayinclude restricting the channel duration time of the websocketcommunication channel when the predetermined condition is satisfied. Thewebsocket communication channel may remain established when thepredetermined condition is not satisfied.

The requesting of print data to the external apparatus may includerequesting the print data through the websocket communication channel.

The requesting of print data to the external apparatus may includerequesting the print data through a data request websocket communicationchannel other than the websocket communication channel.

According to still another aspect of the present disclosure, there is amethod of managing a websocket communication channel, the methodincluding establishing a first websocket communication channel and asecond websocket communication channel for communicating with anexternal apparatus; acquiring print data for controlling a printingoperation of the printing apparatus from the external apparatus throughthe first websocket communication channel; acquiring control data forcontrolling a state of the printing apparatus from the externalapparatus through the second websocket communication channel; andrestricting a channel duration time of the first websocket communicationchannel.

The control data may include peripheral apparatus registrationinformation for the printing apparatus controlling a peripheralapparatus connected to the printing apparatus.

The restricting of a channel duration time of the first websocketcommunication channel may include determining a closing time of thefirst websocket communication channel.

The restricting of a channel duration time of the first websocketcommunication channel may include interrupting the first websocketcommunication channel within a predetermined time period after the printdata is acquired.

According to still another aspect of the present disclosure, there is adata management method of a printing apparatus, the data managementmethod including establishing a websocket communication channel forcommunicating with an external apparatus; and acquiring control data forcontrolling an operation of the printing apparatus through the websocketcommunication channel, wherein when the control data is print data forcontrolling a printing operation of the printing apparatus, theacquiring of control data includes acquiring the print data in responseto a request for the print data to the external apparatus.

According to still another aspect of the present disclosure, there is aprinting apparatus including a communication unit configured toestablish a communication channel for communicating with an externalapparatus and perform data communication with the external apparatus; aprinting unit configured to perform a printing operation; and a controlunit configured to control the communication unit to establish a firstwebsocket communication channel with the external apparatus, requestprint data for performing the printing operation to the externalapparatus through the first websocket communication channel by means ofthe communication unit, acquire the print data from the externalapparatus through the first websocket communication channel in responseto the request for the print data by means of the communication unit,and perform the printing operation on the basis of the acquired printdata by means of the printing unit, wherein the print data is generatedby the external apparatus and written in a format processible by theprinting apparatus.

When the control unit transmits a data request message, the control unitmay acquire an event that requests state information of the printingapparatus from the external apparatus by means of the communication unitand may transmit a data request message including the state informationof the printing apparatus in response to the event requesting the stateinformation.

The control unit may determine whether a predetermined conditionassociated with the acquisition of the print data is satisfied and maycontrol a channel duration time of the first websocket communicationchannel by means of the communication unit.

The control unit may establish a second websocket communication channelfor communicating with the external apparatus by means of thecommunication unit and may acquire control data other than the printdata as data for controlling a state of the printing apparatus throughthe second websocket communication channel.

The technical solutions of the present disclosure are not limited to theaforementioned solutions, and other technical solutions which are notdescribed herein should be clearly understood by those skilled in theart from the following detailed description and the accompanyingdrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentdisclosure will become more apparent to those of ordinary skill in theart by describing exemplary embodiments thereof in detail with referenceto the accompanying drawings, in which:

FIG. 1 briefly shows a first system according to the present disclosure;

FIG. 2 briefly shows a second system according to the presentdisclosure;

FIG. 3 briefly shows an external control apparatus according to anembodiment of the present disclosure;

FIG. 4 briefly shows a printing apparatus according to an embodiment ofthe present disclosure;

FIG. 5 shows a first system according to an embodiment of the presentdisclosure;

FIG. 6 shows a first system according to another embodiment of thepresent disclosure;

FIG. 7 briefly shows a hub printing apparatus according to an embodimentof the present disclosure;

FIG. 8 shows a flowchart illustrating a printing method according to anembodiment of the present disclosure;

FIG. 9 shows a flowchart illustrating a management method for awebsocket communication channel according to an embodiment of thepresent disclosure;

FIG. 10 is a flowchart showing an operation of controlling a channelduration time of a websocket channel in a management method for awebsocket communication channel in detail according to an embodiment ofthe present disclosure;

FIG. 11 is a flowchart showing a peripheral apparatus management methodaccording to an embodiment of the present disclosure;

FIG. 12 is a flowchart showing a peripheral apparatus management methodaccording to another embodiment of the present disclosure;

FIG. 13 is a flowchart showing a peripheral apparatus management methodaccording to another embodiment of the present disclosure;

FIG. 14 is a flowchart illustrating a peripheral apparatus managementmethod according to still another embodiment of the present disclosure;

FIG. 15 shows a flowchart illustrating a websocket channel managementmethod in detail according to an embodiment of the present disclosure;

FIG. 16 briefly shows a third system according to an embodiment of thepresent disclosure;

FIG. 17 briefly shows a third system according to another embodiment ofthe present disclosure;

FIG. 18 briefly shows a user terminal according to an embodiment of thepresent disclosure;

FIG. 19 is a flowchart illustrating a data management method accordingto an embodiment of the present disclosure;

FIG. 20 is a flowchart illustrating a data management method accordingto an embodiment of the present disclosure;

FIG. 21 briefly shows a data distribution server 500 according to anembodiment of the present disclosure;

FIG. 22 shows a printing apparatus 600 according to an embodiment of thepresent disclosure;

FIG. 23 shows a channel establishment system according to an embodimentof the present disclosure;

FIG. 24 shows an electronic apparatus control method according to anembodiment of the present disclosure;

FIG. 25 shows an electronic apparatus control method according to anembodiment of the present disclosure;

FIG. 26 shows a communication channel manager according to an embodimentof the present disclosure;

FIG. 27 shows a communication channel manager according to anotherembodiment of the present disclosure; and

FIG. 28 shows a printing system according to an embodiment of thepresent disclosure.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, embodiments will be described in detail with reference tothe accompanying drawings. However, the present disclosure is notrestricted or limited to the embodiments. Also, like reference numeralsin the drawings denote like elements.

In the drawings, the thickness of layers and regions may be exaggeratedfor clarity. Also, when it is mentioned that an element or layer is “on”another element or layer, the element or layer may be formed directly onanother element or layer, or a third element or layer may be interposedtherebetween. Like reference numerals refer to like elements throughoutthe specification.

Moreover, detailed descriptions about well-known functions orconfigurations associated with the present disclosure will be ruled outin order not to unnecessarily obscure the subject matter of the presentdisclosure. It should also be noted that, although ordinal numbers (suchas first and second) are used in the following description, they areused only to distinguish similar components.

Hereinafter, an element according to the present disclosure will bedescribed in detail with reference to the accompanying drawings. Thesuffixes “module” and “unit” for elements used in the followingdescription are given or used interchangeably only for facilitation ofpreparing this specification, and thus they are not granted a specificmeaning or function.

1. Overview

In this disclosure, a method, apparatus, and system for performing aprinting operation through a bidirectional communication channel will bedescribed. In detail, a method, apparatus, and system for performing theprinting operation through a websocket communication channel will bedescribed.

2. Data Communication Method

The printing method, apparatus, and system described herein may includean element for transmitting or receiving data. In this case, the datamay be transmitted or received by a specific communication method.

The specific communication method may be a method of performingcommunication through a communication channel capable of duplexcommunication.

The specific communication method may be a method of performingcommunication through a communication channel capable of asynchronouscommunication. The specific communication method may be a method ofperforming communication through a communication channel capable ofduplex asynchronous communication (e.g., a websocket channel).

The communication methods will be described below.

2.1 Duplex Communication

In the printing method or the like of the present disclosure, datatransmission and reception may be performed using a duplex communicationmethod. In the printing method or the like of the present disclosure,bidirectional data communication may be performed using a singlecommunication channel capable of duplex communication.

The duplex communication channel may be a full-duplex communicationchannel. The full-duplex communication channel may be a communicationchannel that allows bidirectional data transmission through a singlecommunication channel. Accordingly, the duplex communication may referto a communication method in which data may be transmittedbi-directionally and simultaneously.

The duplex communication method may enable real-time communicationbetween two apparatuses connected through a duplex communicationchannel. Also, the duplex communication channel may accommodate aplurality of concurrent users, and data may be smoothly acquired throughthe duplex communication channel when printing requests aresimultaneously received from a plurality of terminals.

2.2 Asynchronous Communication

In the printing method or the like of the present disclosure, data maybe transmitted and received using an asynchronous communication method.In the printing method or the like of the present disclosure, when afirst party transmits data to a second party through a communicationchannel capable of asynchronous communication, the first party maytransmit the data to the second party without receiving a data requestfrom the second party. In other words, when an asynchronouscommunication channel is used, the first party may transmit data to thesecond party at any time, and the transmission of data may be performedwithout a request from the second party.

2.3 Duplex Asynchronous Communication

2.3.1 Duplex Asynchronous Communication Method

In the printing method or the like of the present disclosure, data maybe transmitted and received using a duplex asynchronous communicationmethod. That is, the data transmission and reception may be performedthrough a communication channel having both of the above-describedcharacteristics of the asynchronous communication channel and the duplexcommunication channel. In other words, the transmission of data may bebi-directionally performed through a single channel. The transmission ofdata may be performed without a request from a reception party at anytime by a duplex asynchronous communication channel being used. Forexample, in the printing method or the like of the present disclosure,data may be transmitted and received using a websocket communicationmethod.

2.3.2 Websocket Communication Method

According to an embodiment of the present disclosure, a communicationchannel used for the data transmission and reception may be a websocketcommunication channel.

Here, websocket refers to a communication specification that enablesbi-directional data transmission and reception between a server and aclient. The websocket communication channel refers to a logicalcommunication path through which data is transmitted and receivedaccording to a websocket protocol. The websocket protocol may be ahypertext markup language (HTML) 5-based communication protocol forconnecting a web browser and a web server.

The websocket communication may be a full-duplex communication protocolthat provides complete duplex communication between devices connected toeach other through the websocket channel. In other words, bi-directionaltransmission and reception between devices connected through thewebsocket channel may be simultaneously performed. The duplexcommunication using the websocket channel may support asynchronous datatransmission.

Also, the data transmission and reception through the websocket channelmay be performed in an asynchronous manner. In other words, thewebsocket channel may perform asynchronous data transmission andreception. For example, when a reception device for receiving data and atransmission device for transmitting data are connected through thewebsocket channel, data may be transmitted from the transmission deviceto the reception device without a request from the reception device. Inother words, push-type data transmission and reception may be performedbetween the devices connected through the websocket channel.Accordingly, data may be transmitted at any time, and a time at whichthe transmission device transmits data and a time at which the receptiondevice receives data may be different from each other. The asynchronousdata transmission and reception through the websocket channel may beperformed bidirectionally and simultaneously.

Establishment of the websocket channel may be initiated by apredetermined handshake. For example, when the websocket channel isestablished between a first device and a second device, theestablishment of the websocket channel may be initiated by a handshakefrom the first device to the second device. The handshake may conform tothe HyperText Transfer Protocol (HTTP) protocol. The handshake maydenote that the first device transmits a handshake message to the seconddevice. Generally, the handshake message may be implemented as a messageonly having a meaning of an apparatus requesting that another apparatusestablish a websocket channel.

The websocket channel may have a characteristic of remainingestablished. When the websocket channel is established, the channel mayremain established as long as a separate request that the channel beclosed or interrupted is not generated by at least one terminal that isdirectly or indirectly connected to the channel.

The established websocket channel may be closed according to a channelclosure request from an apparatus that is directly or indirectlyconnected to the websocket channel. The channel closure request may beimplemented as a message through which one party requests that the otherparty close the channel.

A single apparatus may be connected to a plurality of websocket channel.When a single apparatus is connected to the plurality of websocketchannels, two or more other apparatuses may be connected to theplurality of websocket channels. In this case, the plurality ofwebsocket channels may transmit and receive data having a plurality ofdata formats. In other words, the plurality of websocket channels mayinclude a first websocket channel for transmitting and receiving firstformat data and a second websocket channel for transmitting andreceiving second format data. Specifically, the apparatus may include aplurality of websocket ports or sessions and establish a plurality ofwebsocket channels.

Hereinafter, unless specially stated otherwise, bidirectionalcommunication refers to websocket communication and a bidirectionalcommunication channel refers to a websocket communication channel.However, the present disclosure is not limited thereto and can also beexpansively applied to other communication methods that actually orvirtually provide a duplex and/or asynchronous communication channel.

2.4 Data

The printing method or the like of the present disclosure may beperformed using various kinds of data. The data used for the printingmethod or the like of the present disclosure may be transmitted orreceived using the above-described communication channels. Here, thetype and format of data will be described.

2.4.1 Type of Data

The printing method according to the present disclosure may includeprocessing control data for controlling an apparatus.

The control data may be control data for controlling the printingoperation of an apparatus. The control data may be print data forcontrolling a printing operation. The print data may include informationregarding a printing target, a printing environment, and a printingcondition required for the apparatus to perform the printing operation.

The print data may be data regarding details of the printing. As anexample, the data may include print document data to be printed. Theprint document data may be understood as data regarding a documentdisplayed on printed matter acquired through the printing operation.

The control data may be data for controlling the printing apparatus. Thedata may include identification information of the printing apparatus.The data may include identification information of a port to which theprinting apparatus is connected. As another example, the data mayinclude designation information for designating the printing apparatus.The control data may be control command data specific to the printingapparatus.

The control data may be control data for controlling operation of aperipheral apparatus connected to the printing apparatus. The controldata for controlling a peripheral apparatus may be control data foracquiring information by means of the peripheral apparatus. The controldata for controlling a peripheral apparatus may be control data forcontrolling operation of the peripheral apparatus.

The printing method according to the present disclosure may includeprocessing state data for acquiring state information of an apparatus.

The state data may be state data of the printing apparatus. For example,the data may include information regarding whether the printer apparatusis capable of performing the printing operation. The data may includeinformation regarding a printing operation status of the printingapparatus or information regarding a printing operation result of theprinting apparatus.

The state data may be state data of a peripheral apparatus connected tothe printing apparatus. The state data may indicate a network state, apower state, an input reception state, or the like of the peripheralapparatus.

Data processed while printing according to the present disclosure isperformed is not limited to the above-described examples and may includedata that is directly or indirectly associated with embodimentsdescribed in the present disclosure. Also, the illustrated data is notan element that is independently handled. Data including one or morepieces of information or only a portion of the information may be used.

2.4.2 Format of Data

The printing method according to the present disclosure may includeprocessing specific format data. The printing method according to thepresent disclosure may include converting a format of the data. Theprinting method according to the present disclosure may includeprocessing data expressed in one or more formats.

The data may have a format understandable by some or all apparatusesassociated with the printing method. The data may have a command formatunderstandable by the printing apparatus. The data may have a commandformat understandable by a peripheral apparatus connected to anapparatus for performing the printing operation. The data may have acommand format specific to an apparatus for ultimately controlling thedata. The data may be written in a command format specific to a targetapparatus.

The printing method according to the present disclosure may includeprocessing data expressed in one or more layers. The data may be binaryformat data. The data may be text data.

The printing method according to the present disclosure may includeprocessing data that is at least partially encrypted. The data mayinclude plaintext.

The printing method according to the present disclosure may includeprocessing data expressed in one or more languages.

Hereinafter, a format understandable by any apparatus may refers to aformat processible by the apparatus or a format interpretable by theapparatus. Also, a format understandable by any apparatus may refers toa command format which is specific to the apparatus.

3. First Process: Web Printing

3.1 Performing Printing Operation According to First Printing Process

As an example of the printing process disclosed herein, a system,method, and apparatus for performing a printing operation through theabove-described communication channel will be described below.Specifically, a system, method, and apparatus for transmitting andreceiving data regarding the printing operation through a websocketcommunication channel will be described below.

3.1.1 System

3.1.1.1 First System

A printing method according to a first process described herein may beimplemented by a system including an external control apparatus and aprinting apparatus connected to the external control apparatus through acommunication channel (i.e., a first system). The communication channelfor connecting the external control apparatus and the printing apparatusmay be the above-described websocket communication channel. The firstsystem may be implemented as a point of sale (POS) system. In this case,the POS system may have a function of collectively managing dataregarding transactions, collecting customer information, and enhancingtransaction convenience at a retail store or the like where products aresold.

FIG. 1 briefly shows the first system according to the presentdisclosure. Referring to FIG. 1, the first system may include anexternal control apparatus 100 and a printing apparatus 200.

The first system may include the external control apparatus 100. Theexternal control apparatus 100 may acquire a user input. The externalcontrol apparatus 100 may process and store data. The external controlapparatus 100 may communicate with the printing apparatus 200 totransmit or receive data.

The external control apparatus 100 may acquire data regarding theprinting operation. The external control apparatus 100 may acquire datafrom outside the system. The external control apparatus 100 acquiringdata may include the external control apparatus 100 generating the data.

In the first system implemented as the POS system, the above-describedexternal control apparatus 100 may be a POS host. The POS host maygenerate transaction data in consideration of a product number, aproduct name, a product price, etc. The POS host may transmit thetransaction data to a POS printer. The POS host may be implemented in aPC-based environment.

The first system may include the printing apparatus 200. The printingapparatus 200 may establish a communication channel for communicatingwith an external apparatus to transmit or receive data. The printingapparatus 200 may establish the communication channel with the externalapparatus. The communication channel may be established between theprinting apparatus 200 and the external apparatus. The printingapparatus 200 may perform the printing operation.

The printing apparatus 200 may acquire control data from the externalapparatus and operate on the basis of the acquired control data. Theprinting apparatus 200 may acquire print data and perform the printingoperation on the basis of the acquired print data. The printingapparatus 200 may include a server unit. The printing apparatus 200 mayprovide a web application or a web page to the external apparatus.

In the first system implemented as the POS system, the above-describedprinting apparatus 200 may be a POS printer. The POS printer may print atransaction history on the basis of the transaction data received fromthe POS host.

The external control apparatus 100 and the printing apparatus 200 maytransmit and receive data through the websocket communication channel.The external control apparatus 100 or the printing apparatus 200 mayhave a websocket communication server.

A plurality of websocket communication channels may be establishedbetween the external control apparatus 100 and the printing apparatus200. The plurality of websocket communication channels may include afirst channel and a second channel. A first time for which the firstwebsocket communication channel is remained and a second time for whichthe second websocket communication channel is remained may be overlappedfor at least some time period. The first channel and the second channelmay be remained together for at least some time. The printing apparatus200 may be connected to a plurality of external control apparatuses 100through the websocket communication channels. The external controlapparatus 100 may be connected to a plurality of printing apparatuses200 through the websocket communication channels.

3.1.1.2 Second System

The printing method according to the first process described herein maybe implemented by a system including a printing apparatus 200, anexternal control apparatus 100 connected to the printing apparatus 200through a communication channel, and at least one peripheral apparatusconnected to the printing apparatus 200 (i.e., a second system).Descriptions of the printing apparatus 200, the external controlapparatus 100, and a connection relationship therebetween may be thesame as those described above for the first system.

FIG. 2 briefly shows the second system according to the presentdisclosure. Referring to FIG. 2, the second system may include anexternal control apparatus 100, a hub printing apparatus 200 a, and aperipheral apparatus 300.

The above-described printing apparatus 200 may be implemented as the hubprinting apparatus 200 a. The hub printing apparatus 200 a may beconnected with the at least one peripheral apparatus 300 to perform afunction of controlling the peripheral apparatus 300. The hub printingapparatus 200 a may optionally have a function of performing a printingoperation.

The hub printing apparatus 200 a may acquire data from a controlapparatus and may manage the peripheral apparatus 300 on the basis ofthe acquired data.

The hub printing apparatus 200 a may be connected to a plurality ofperipheral apparatuses 301 to 303. The hub printing apparatus 200 a mayacquire data from the external control apparatus 100 and transfer thedata to at least some of the plurality of peripheral apparatuses 300.

The peripheral apparatus 300 connected to the hub printing apparatus 200a may be an input apparatus configured to receive an external input. Theperipheral apparatus 300 may be an output apparatus configured to outputdata received from the hub printing apparatus 200 a.

The peripheral apparatus 300 may be a secondary printing apparatus. Thesecondary printing apparatus may denote to a printing apparatus whichreceive print data from a hub apparatus. The secondary printingapparatus may acquire data from the hub printing apparatus 200 a and mayperform the printing operation on the basis of the acquired data. Theperipheral apparatus 300 may include a plurality of secondary printingapparatuses. The secondary printing apparatus may be a legacy printer.The secondary printing apparatus may be a local printer which connectedwith local network.

The external control apparatus 100 may be connected to the hub printingapparatus 200 a through the websocket channel to transmit and receivedata. The external control apparatus 100 may generate data forcontrolling the hub printing apparatus 200 a and at least one peripheralapparatus 300 connected to the hub printing apparatus 200 a and transmitthe generated data to the hub printing apparatus 200 a.

The second system may be implemented as a POS system. In the secondsystem implemented as the POS system, the above-described externalcontrol apparatus 100 may be a POS host. In the second systemimplemented as the POS system, the above-described hub printingapparatus 200 a may be a POS printer. Detailed descriptions of the POShost and the POS printer may be understood as being similar to thosedescribed above for the first system.

In the second system implemented as the POS system, the above-describedperipheral apparatus may be a POS peripheral apparatus. For example, thePOS peripheral apparatus may include a barcode reader, a signature pad,a card reader, etc. A POS peripheral apparatus such as a barcode readermay receive sales information such as a product type, a product price,or the like and process sales data. The POS peripheral apparatus mayreceive transaction information such as a card number, a payment amount,or the like and process transaction data.

In the second system implemented as the POS system, the above-describedsecondary printing apparatus may be a secondary POS printer located in abusiness district that is managed by the POS printer or the POS system.

3.1.2 System Operation

Here, a method of the above-described first system and second systemperforming a printing operation according to a first printing processwill be described. However, the printing operation according to thefirst printing process cannot be only implemented by the first systemand the second system, and may be applied to a system to which anotherapparatus is added or from which some apparatuses are removed.

3.1.2.1 Operation of First System

The first printing process described herein may be implemented by afirst printing system including the printing apparatus 200 and theexternal control apparatus 100. The first printing process implementedby the first printing system may include establishing a communicationchannel and transmitting data.

The establishing of a communication channel may include establishing aduplex asynchronous communication channel between the printing apparatus200 and the external control apparatus 100. The establishing of acommunication channel may include establishing a websocket communicationchannel between the printing apparatus 200 and the external controlapparatus 100.

The establishing of a communication channel may include transmitting, byany one of the printing apparatus 200 and the external control apparatus100, a handshake message. For example, the establishing of acommunication channel may be initiated by the printing apparatus 200transmitting the handshake message to the external control apparatus 100or by the external control apparatus 100 transmitting the handshakemessage to the printing apparatus 200.

More specifically, the establishing of a communication channel may beachieved by the printing apparatus 200 transmitting a handshake requestmessage to the external control apparatus 100, the external controlapparatus 100 transmitting a handshake response message to the printingapparatus 200 in response to the handshake request message, and theprinting apparatus 200 receiving the handshake response message. Theestablishing of a communication channel may be achieved by the externalcontrol apparatus 100 transmitting the handshake request message to theprinting apparatus 200, the printing apparatus 200 transmitting thehandshake response message to the external control apparatus 100, andthe external control apparatus 100 receiving the handshake responsemessage. In this case, the transmission and reception of the handshakerequest message or the handshake response message conform to the HTTPprotocol.

The transmitting of data may include transmitting data through theduplex asynchronous communication channel. The transmitting of data maydenote transmitting data through the websocket channel. Specifically,the transmitting of data may include the external control apparatus 100transmitting data to the printing apparatus 200 through the connectedcommunication channel. In this case, the transmitting of data may denotetransmitting data generated or processed by the external controlapparatus 100 to the printing apparatus 200. The transmitting of datamay include transmitting data from the printing apparatus 200 to theexternal control apparatus 100 through the communication channel. Inthis case, the transmitting of data may denote transmitting datagenerated or processed by the printing apparatus 200 to the externalcontrol apparatus 100.

The transmitting of data may include a printing control apparatustransmitting data to the printing apparatus 200 through thecommunication channel. The external control apparatus 100 may transmitcontrol data generated by the printing control apparatus and related tothe printing operation to the printing apparatus 200.

The printing method according to this embodiment may further includeperforming a printing operation. The performing of a printing operationmay denote that the printing apparatus 200 performs the printingoperation on the basis of the received data. According to a format ofthe received data, the printing apparatus 200 may parse the receiveddata optionally. The printing apparatus 200 may perform the printingoperation on the basis of a result of the parsing. The performing of aprinting operation may denote that a printing module performs theprinting operation on the basis of the received signal or data.

3.1.2.2 Operation of Second System

The first printing process described herein may be implemented by asecond printing system including the external control apparatus 100, thehub printing apparatus 200 a, and the peripheral apparatus 300. Thefirst printing process implemented by the second printing system mayinclude establishing a communication channel, transmitting data, andtransferring data.

The establishing of a communication channel may denote establishing acommunication channel between the hub printing apparatus 200 a and theexternal control apparatus 100. A detailed description of theestablishing of a communication channel may be understood as beingsimilar to that described above for the first system.

The transmitting of data may include the external control apparatus 100transmitting data to the printing apparatus 200. A detailed descriptionof the transmitting of data may be understood as being similar to thatdescribed above for the first system.

The transmitted data may include control information for controlling theperipheral apparatus 300, apparatus identification information foridentifying n destination apparatus. The destination apparatus may bethe destination of the data. The destination apparatus may acquire thedata at last. The destination apparatus may be controlled by the controlinformation included in the data. The data may be print data forcontrolling a printing operation when the peripheral apparatus 300 is nsecondary printing apparatus, etc. A detailed description is the same asthat described above for the second system.

The transferring of data may include the printing apparatus, that is,the hub printing apparatus 200 a transferring the received data to theperipheral apparatus 300.

The transferring of data may denote that the hub printing apparatus 200a transfers the data to the peripheral apparatus 300 by a wiredconnection or over a wireless network.

When a plurality of peripheral apparatuses 300 are provided, the hubprinting apparatus 200 a may transmit the data to at least one of theperipheral apparatuses 300. In this case, the transferring of data maybe performed on the basis of peripheral apparatus identificationinformation included in the data. The transferring of data may denotetransferring the data to the peripheral apparatus 300 determined by thehub printing apparatus 200 a. In this case, the hub printing apparatus200 a may determine the peripheral apparatus 300 to receive the data onthe basis of any one of a format, type, and content of the data.

When the peripheral apparatus 300 is a secondary printing apparatus, thedata may be control data for controlling operation of the secondaryprinting apparatus.

In this case, the transferring of the data by the hub printing apparatus200 a may include acquiring identification information of the secondaryprinting apparatus from the data and transferring the data on the basisof the acquired identification information.

When the peripheral apparatus 300 includes a plurality of secondaryprinting apparatuses, the transferring of data may include the hubprinting apparatus 200 a transferring the received data to at least someof the plurality of secondary printing apparatuses.

When the peripheral apparatus 300 includes the plurality of secondaryprinting apparatuses, the transferring of data may include the hubprinting apparatus 200 a determining at least one of the plurality ofsecondary printing apparatuses to which the data is to be transferred.The determining of a secondary printing apparatus to which the data isto be transferred may include acquiring identification information ofthe peripheral apparatus 300 that will ultimately acquire the data fromthe data and transmitting the data to the peripheral apparatus 300corresponding to the identification information. The determining of asecondary printing apparatus to which the data is to be transferred mayinclude determining a secondary printing apparatus that will receive thedata on the basis of any one of the format, type, and content of thedata.

3.1.3 Configuration of Each Apparatus

Here, operations performed by the apparatuses constituting theabove-described first system and second system will be described.However, the printing method or the like of the present disclosure isperformed not only by the apparatuses, which will be described below,but it should be interpreted that each of the apparatuses may bereplaced with other electronic apparatuses for performing its ownfunction or similar functions or a combination thereof.

Also, the term “unit” used herein, which constitutes any apparatus, doesnot only refer to a physical element provided in the apparatus, but mayalso denote a software element executed in the apparatus.

3.1.3.1 External Control Apparatus

A printing operation according to the present disclosure may becontrolled by a control apparatus. The control apparatus may beunderstood as being the external control apparatus in theabove-described first and second systems. The external control apparatusmay generate control data and transmit the control data to an externalapparatus. The external control apparatus may communicate with aprinting apparatus to perform a function of controlling the printingapparatus. In a POS system, the control apparatus may be implemented asa POS host.

Here, the external device may be a device configured to execute a webapplication. The external control apparatus may include a web browserconfigured to communicate with the printing apparatus through a web pageprovided by a web server. The external control apparatus may be anelectronic device on which a web application provided by a web server isrunning or installed. The external control apparatus may be a mobileterminal such as a smartphone, a tablet PC, a laptop, a desktop, or thelike.

FIG. 3 briefly shows the external control apparatus 100 according to anembodiment of the present disclosure. Referring to FIG. 3, the externalcontrol apparatus 100 may include a communication unit 110, a user inputunit 130, a memory unit 150, and a control unit 170. The communicationunit 110 or the like may be included in the external control apparatusesas a physical element. However, the present disclosure is not limitedthereto. Alternatively, the communication unit 110 or the like may beimplemented as a software element included in the external controlapparatus 100.

The external control apparatus 100 may include the communication unit110 configured to communicate with an external apparatus. Thecommunication unit 110 may communicate with the external apparatusthrough a local area network (LAN), a wireless local area network(WLAN), WiFi, ZigBee, WiGig, Bluetooth, etc.

The communication unit 110 may establish a communication channel withthe external apparatus and perform data communication with the externalapparatus through the communication channel. The communication channelmay be a duplex asynchronous communication channel. The communicationchannel may be a websocket communication channel.

The communication unit 110 may transfer data received from the controlunit 170 or the user input unit 130 to the external apparatus, that is,a printing apparatus through the communication channel. Thecommunication unit 110 may transfer data acquired from the externalapparatus to the control unit 170 through the communication channel.

When the communication unit 110 establishes a duplex asynchronouscommunication channel with the external apparatus, the communicationunit 110 may transmit data to the external apparatus at any time. Thecommunication unit 110 may simultaneously transmit and receive data toand from the external apparatus. This can also be equally applied to acase in which the communication unit 110 transmits data to the externalapparatus.

The communication unit 110 may perform a handshake operation toestablish the websocket channel with the external apparatus. Thecommunication unit 110 may start to establish the websocket channel bytransmitting a handshake message to the external apparatus. Thecommunication unit 110 may initiate establish the websocket channel bytransmitting a handshake message to the external apparatus. When thecommunication unit 110 transmits a handshake message to the externalapparatus, the communication unit 110 may function as a websocketclient. The communication unit 110 may establish the websocket channelby receiving the handshake message from the external apparatus andtransmitting a response message in response to the reception. When thecommunication unit 110 receives the handshake message, the communicationunit 110 may function as a websocket server.

The external control apparatus 100 may include the user input unit 130configured to acquire a user input. The user input unit 130 may acquirethe user input to acquire data regarding the printing operation. Theacquired data is obtained based on the acquired user input. For example,the user input unit 130 may acquire a touch input, a voice input, akeyboard input, or the like from a user.

The user input unit 130 may acquire a user input including informationregarding control of the printing operation. The user input may at leastpartially include information regarding the printing operation, such asprinted content, a printing format, and printing apparatus information.The user input unit 130 may transfer the acquired user input to thecontrol unit 170 or the communication unit 110.

The external input apparatus may include the memory unit 150. The memoryunit 150 may store data acquired from the outside, data generated by theexternal control apparatus 100, input data received from the user, etc.

The external control apparatus 100 may include the control unit 170.

The control unit 170 may receive the information from the user by meansof the user input unit 130. The control unit 170 may establish acommunication channel with an external apparatus by means of thecommunication unit 110 and may acquire data from the external apparatusor transmit data to the external apparatus. The control unit 170 mayacquire data from the user input unit 130 or the communication unit 110.

The control unit 170 may generate control data for controlling theprinting operation on the basis of a user input acquired from the userinput unit 130. The control unit 170 may transfer the control data tothe printing apparatus by means of the communication unit 110.

The control unit 170 may acquire data. The control unit 170 acquiringdata includes the control unit 170 generating data.

The acquiring of the data by the control unit 170 may be implemented byprocessing data acquired from the outside. The processing of data maydenote modifying the data or adding or combining additional data to thedata. The acquiring of data may be performed by a data generation unit.The data generation unit may be provided separately from the controlunit 170.

The external control apparatus 100 acquiring data may denote that theexternal control apparatus 100 parses pre-acquired base data to acquirethe data. Specifically, the external control apparatus 100 may acquireany one of print data for controlling the printing operation of theprinting apparatus, document data on which the print data is generated,and raw data of a document to be printed. The document data may be abasis of print data. The data generated by the external controlapparatus 100 may be implemented in a language understandable by theprinting apparatus.

The control unit 170 may convert the format of data. The converting ofthe format of data may include converting the data in a language that isinterpretable (or processible) by a specific apparatus. The convertingof data may be performed by a data acquisition unit that is providedseparately from the control unit 170.

The converting of the format of data may denote converting the data intoa format interpretable by the printing apparatus. When the printingapparatus is a hub printing apparatus, the converting of the format ofdata may denote converting the data into a format interpretable by atleast some peripheral apparatuses connected to the printing apparatus.More specifically, the format of data may be converted into a formatinterpretable by a secondary printing apparatus connected to the hubprinting apparatus.

3.1.3.2 Printing Apparatus

The data management according to an embodiment of the present disclosuremay be performed by a printing apparatus. The printing apparatus mayreceive data from an external control apparatus. The printing apparatusmay perform a printing operation on the basis of the data received fromthe external control apparatus. In a POS system, the printing apparatusmay be implemented as a POS printer.

FIG. 4 shows the printing apparatus 200 according to an embodiment ofthe present disclosure. Referring to FIG. 4, the printing apparatus 200may include a communication unit 210, a printing unit 230, a memory unit250, and a control unit 270.

The printing apparatus 200 may include the communication unit 210configured to communicate with an external apparatus. The communicationunit 210 may receive data from the external apparatus or transmit datato the external apparatus. The communication unit 210 may be connectedto an external control apparatus over a network such as a LAN, a WLAN,WiFi, Zigbee, WiGig, and Bluetooth.

The communication unit 210 may establish a communication channel withthe external apparatus. The communication unit 210 may establish acommunication channel for communicating with the external apparatus. Thecommunication channel may be a websocket communication channel. Thecommunication unit 210 may be a websocket communication unit. Thewebsocket communication unit may function as a websocket server or awebsocket client. The websocket communication unit does not denote onlya physical element, but includes a software element configured to manageestablishment, closure, etc. of the websocket communication channel.

The printing apparatus 200 may include the printing unit 230 configuredto perform the printing operation. The printing unit 230 may perform theprinting operation on the basis of print data. According to a printingenvironment designated by the print data, the printing unit 230 mayperform the printing operation on an object to be printed included inthe print data. The print data that controls the printing operation ofthe printing unit 230 may be received from an external control apparatusthrough the communication unit 210 or may be acquired form an electronicdevice connected to the printing apparatus 200 in a wired or wirelessmanner.

The printing apparatus 200 may include the memory unit 250. The memoryunit 250 may store print data for performing the printing operation.

The control unit 270 may acquire data from an external apparatus ortransmit data to the external apparatus by means of the communicationunit 210. The control unit 270 may perform the printing operation bymeans of the printing unit 230. The control unit 270 may provide a webapplication or the like to an external apparatus by means of a webserver, which will be described below. The control unit 270 may manageat least one peripheral apparatus connected to the printing apparatus200 by means of a peripheral apparatus control unit 290 a, which will bedescribed below.

The control unit 270 may establish a communication channel with anexternal control apparatus and receive data from the external controlapparatus. The control unit 270 may control the printing operation onthe basis of the received data. The control unit 270 may generatecontrol data or convert the format of the received data on the basis ofthe received data. The control unit 270 may generate control data forcontrolling operation of the at least one peripheral apparatus connectedto the printing apparatus 200.

According to an embodiment of the present disclosure, the printingapparatus 200 may include a web server. The web server may provide a webpage, a web application, or the like to the external control apparatus.However, the web server does not necessarily have to be included in theprinting apparatus 200 and may be provided by a server apparatusprovided separately from the printing apparatus 200. The web serverincluded in the printing apparatus 200 will be described below withreference to FIG. 5.

FIG. 5 shows a first system according to an embodiment of the presentdisclosure. Referring to FIG. 5, the external control apparatus 100 mayinclude a web browser WB. The web browser WB may execute a webapplication WA1. The web application WA1 may be provided by the printingapparatus 200. The printing apparatus 200 may have a web server WS1 andmay provide a web application WA2, which is stored in the web serverWS1, to the external control apparatus 100. The web applications WA1 andWA2 may provide source code so that the external control apparatus 100may control the printing apparatus 200 or may acquire information fromthe printing apparatus 200. The web applications WA1 and WA2 may includea user interface to acquire a control command from a user of theexternal control apparatus 100 or display a state of the printingapparatus 200 to the user.

FIG. 6 shows a first system according to another embodiment of thepresent disclosure. Referring to FIG. 6, the first system may furtherinclude a server apparatus 10. In this case, the server apparatus 10 mayhave a web server WS2 and may provide a web application WA3, which isstored in the web server WS2, to the external control apparatus 100. Theexternal control apparatus 100 may include the web browser WB and mayexecute the web application WA3 provided by the web server WS2 by meansof the web browser WB.

In the above-described first system, the server apparatus 10 may denotea server apparatus 10 provided separately from the external controlapparatus 100 and the printing apparatus 200. The server apparatus 10may have the web server WS2 to store apparatus information of theprinting apparatus, apparatus information of peripheral apparatusesconnected to the printing apparatus, or the like as well as to providethe web application WA3 to the external control apparatus 100.

According to an embodiment of the present disclosure, the printingapparatus 200 may be implemented as a hub printing apparatus. The hubprinting apparatus may relay data between apparatuses. Unless speciallystated otherwise, the hub printing apparatus may be implementedsimilarly to the printing apparatus.

The hub printing apparatus may be connected to at least one peripheralapparatus to transmit data to the at least one peripheral apparatus oracquire data from the peripheral apparatus.

The hub printing apparatus may manage a peripheral apparatus. Themanaging of a peripheral apparatus by the hub printing apparatusincludes controlling an operation or state of the peripheral apparatuson the basis of peripheral apparatus control data acquired from theoutside or generated by the printing apparatus.

FIG. 7 briefly shows the hub printing apparatus 200 a according to anembodiment of the present disclosure. Referring to FIG. 7, the hubprinting apparatus 200 a may have a communication unit 210 a, a memoryunit 250 a, a control unit 270 a, and a peripheral apparatus controlunit 290 a.

The communication unit 210 a may establish a communication channel withan external apparatus and may transmit data to the external apparatus oracquire data from the external apparatus. The communication unit 210 amay perform data communication with the peripheral apparatus.

The hub printing apparatus 200 a may have the memory unit 250 a to storedata. The memory unit 250 a may store data for controlling the hubprinting apparatus 200 a or the peripheral apparatus 300 connected tothe hub printing apparatus 200 a.

The control unit 270 a may communicate with a control apparatus and theperipheral apparatus by means of the communication unit 210 a. Thecontrol unit 270 a may control or manage at least one peripheralapparatus 300 connected to the hub printing apparatus 200 a by means ofthe peripheral apparatus control unit 290 a, which will be describedbelow.

The hub printing apparatus 200 a may include the peripheral apparatuscontrol unit 290 a. The peripheral apparatus control unit 290 a maytransmit data to the at least one peripheral apparatus 300 or acquiredata from the peripheral apparatus 300. The hub printing apparatus 200 adoes not separately include the peripheral apparatus control unit 290 aand may perform a function of the peripheral apparatus control unit 290a by means of the control unit 270 a.

When a plurality of peripheral apparatuses 300 are provided, theperipheral apparatus control unit 290 a may determine a peripheralapparatus to which the data is to be transmitted.

The determining of a peripheral apparatus to which the data is to betransmitted may be performed on the basis of peripheral apparatusidentification information included in the data. The peripheralapparatus identification information may be provided as port informationof the printing apparatus to which the peripheral apparatus or thesecondary printing apparatus is connected.

The determining of a peripheral apparatus to which the data is to betransmitted may be performed in consideration of the format of thereceived data. The hub printing apparatus 200 a may transmit the data toan apparatus that may understand the received data.

The determining of a peripheral apparatus to which the data is to betransmitted may be performed in consideration of the type of thereceived data. When the control data is control data for acquiring animage, the hub printing apparatus 200 a may transfer the control data toa peripheral apparatus configured to capture an image.

The determining of a peripheral apparatus to which the data is to betransmitted may be performed in consideration of states of the pluralityof peripheral apparatuses. For example, when the peripheral apparatuscontrol unit 290 a determines a peripheral apparatus to which print datais to be transmitted, the peripheral apparatus control unit 290 a maytransmit the print data to a secondary printing apparatus that is notperforming a printing operation.

The determining of a peripheral apparatus to which the data is to betransmitted by the hub printing apparatus 200 a may conform to apredetermined priority. The priority may be designated by a user. Thepriority may be determined in consideration of a network connectionstate of the peripheral apparatuses, a distance from the hub printingapparatus 200 a, etc.

The hub printing apparatus 200 a may optionally have a printing unit 230a. When the hub printing apparatus 200 a does not have the printing unit230 a and receives print data, the hub printing apparatus 200 a maytransfer the print data to a secondary printing apparatus connected tothe hub printing apparatus 200 a.

In other words, the hub printing apparatus 200 a may receive data froman external apparatus and transfer the received data to at least oneperipheral apparatus connected to the hub printing apparatus 200 a. Forexample, the hub printing apparatus 200 a may acquire print data from anexternal control apparatus and transmit the print data to an appropriatesecondary printing apparatus.

When a plurality of peripheral apparatuses are provided, the pluralityof peripheral apparatuses may include a plurality of secondary printingapparatuses. In this case, the hub printing apparatus 200 a may transmitdata to the plurality of secondary printing apparatuses. The hubprinting apparatus 200 a may acquire identification information (ordestination information) for designating a secondary printing apparatusto perform the printing operation from the data acquired from theexternal control apparatus and may transmit the data to thecorresponding secondary printing apparatus on the basis of theidentification information.

When the plurality of peripheral apparatuses include a plurality ofsecondary printing apparatuses, the hub printing apparatus 200 a maytransmit data to the secondary printing apparatus in consideration ofthe type of the data. When the data is print data, the hub printingapparatus 200 a may transfer the data to the secondary printingapparatus.

3.1.3.3 Peripheral Apparatus

Data management according to an embodiment of the present disclosure maybe performed by a peripheral apparatus connected to the printingapparatus. The peripheral apparatus may have a communication unit and acontrol unit.

The communication unit may receive data from a connected hub printingapparatus or transmit data to the printing apparatus.

The control unit may perform data communication with the printingapparatus by means of the communication unit. The peripheral apparatusmay be connected to the hub printing apparatus by a wired connection orover a wireless network and may acquire data from the hub printingapparatus or transfer data to the hub printing apparatus. The networkmay be a local network. The wired connection may be a USB connection.

The peripheral apparatus may receive a control command from the hubprinting apparatus. The peripheral apparatus may transmit state data tothe hub printing apparatus.

The control unit may acquire data from the printing apparatus connectedthereto and perform an operation corresponding to the data. The controlunit may acquire state information of the peripheral apparatus andtransfer the state information to the external apparatus.

The peripheral apparatus may receive data from the printing apparatusconnected thereto and operate on the basis of the received data. Thedata received by the peripheral apparatus may be control data regardingan operation or an operational environment of the peripheral apparatus.

The peripheral apparatus may transfer the acquired data to the printingapparatus. The data acquired by the peripheral apparatus and transferredto the printing apparatus may be state information of the peripheralapparatus. The state information of the peripheral apparatus mayindicate an operation status, an operational availability (For example,whether or not the printing operation can be performed at a specificpoint in time), etc. of the peripheral apparatus.

The peripheral apparatus may optionally have an input unit. The inputunit may receive electronic information from a user. The peripheralapparatus may acquire product information, payment card information,etc. The input unit may receive information from the user on the basisof visual information, auditory information, tactile information, etc.Specifically, the peripheral apparatus may have a voice input unit, atouch input unit, an image recognition unit, etc.

In the above-described POS system, a peripheral apparatus having such aninput unit may be implemented as a barcode reader, a card reader, asignature pad, an electronic transaction device, or the like.

The peripheral apparatus may optionally have an output unit. The outputunit may visually or audibly output information to provide theinformation to the user on the basis of the data acquired from the hubprinting apparatus. In the above-described POS system, a peripheralapparatus having such an output unit may be implemented as a cashdrawer, a transaction history display device, or the like.

3.1.3.4 Secondary Printing Apparatus

The printing operation according to an embodiment of the presentdisclosure may be performed by a secondary printing apparatus. Here, itcan be understood that the secondary printing apparatus refers to aprinting apparatus that is connected to the hub printing apparatus butdoes not have a direct connection(such as network channel) with acontrol apparatus. The secondary printing apparatus may be connected tothe printing apparatus or the hub printing apparatus to receive printdata and perform a printing operation on the basis of the print data.

According to an embodiment of the present disclosure, the secondaryprinting apparatus may include a communication unit, a control unit, anda printing unit.

The communication unit may acquire print data from a printing apparatus(i.e., the hub printing apparatus). The communication unit may transmitdata to the hub printing apparatus. The data transmitted to the hubprinting apparatus by the communication unit may be state information ofthe secondary printing apparatus. The state information of the secondaryprinting apparatus may include information regarding a result ofperforming operation of the secondary printing apparatus, informationregarding printing availability of the secondary printing apparatus,etc.

The control unit may acquire a printing control command on the basis ofthe print data acquired from the hub printing apparatus and transfer thecontrol command to the printing unit.

The printing unit may perform the printing operation on the basis of theprint data.

In the above-described POS system, the secondary printing apparatus maybe a printing apparatus that is directly or indirectly connected to thecontrol apparatus of the POS system. The printing apparatus may beprovided and used in a sales store associated with the POS system andmay be provided plurally.

3.2 Data Request

In the printing method or the like of the present disclosure, a duplexasynchronous communication channel or the like may be used as describedabove. More specifically, data communication may be performed using awebsocket communication channel. A transmission time of data when thedata is transmitted using the websocket communication channel will bedescribed below.

3.2.1 Data Transmission in Response to Requesting

In the printing method or the like of the present disclosure, when thedata communication channel is a websocket communication channel, datamay be transmitted from a transmission device to a reception devicewithout a request from the reception device. When the data istransmitted without a request from the reception device, a dataprocessing load of the reception device is increased. Generally, sincethe reception device has a smaller data processing capacity than thetransmission device, confusion may occur due to the arbitrary datatransmission from the transmission device.

According to an embodiment of the present disclosure, the datatransmission may be performed due to a request from the receptiondevice. When the data transmission is performed due to the request fromthe reception device, the reception device may systematically managedata. Specifically, when a data communication channel is established andthe transmission device acquires data to be transmitted to the receptiondevice, the transmission device may not transmit the data until a datarequest is received from the reception device. When the transmissiondevice receives a data request message from the reception device, thetransmission device may transmit data to the reception device on thebasis of the data request message.

Hereinafter, the transmitting of the data request message, which isdefined herein, may be understand as an action of the reception devicerequesting that the transmission device transmit data and does notnecessarily conform to a conventional concept of a data request that iscommonly used in data communication.

In this specification, the reception device acquiring data transmittedon the basis of the data request message may be understood as thereception device acquiring the data in response to requestingtransmission of the data. In this case, the acquiring of data inresponse to the request for the transmission of the data may denotesthat the reception device acquires data transmitted due to the datarequest and does not necessarily denote that the reception devicereceives a response message that is commonly used in general datacommunication.

A system, apparatus, and method for transmitting and managing dataaccording to a data transmission request from a reception device will bedescribed below.

3.2.2 System Operation

A data management method according to an embodiment of the presentdisclosure may be performed by a system including a first apparatus anda second apparatus. The data management method according to anembodiment of the present disclosure may include establishing acommunication channel between the first apparatus and the secondapparatus, transmitting, by the second apparatus, a data request messageto the first apparatus through the communication channel, andtransmitting, by the first apparatus, data to the second apparatus onthe basis of the data request message.

The establishing of a communication channel between the first apparatusand the second apparatus may include establishing the above-describedduplex asynchronous communication channel. Detailed descriptions of thechannel and the establishment of the channel may be understood as beingsimilar to those described above for the first printing process.

According to an embodiment of the present disclosure, all parts of thecommunication channel between the first apparatus and the secondapparatus may be websocket channel. Some parts of the communicationchannel between the first apparatus and the second apparatus may bewebsocket channel and other parts of the communication channel may notbe websocket channel. Some parts of the connection between the firstapparatus and the second apparatus may be wired network connection. Acommunication channel established between the first apparatus and thesecond apparatus may be connected with both of apparatuses directly. Thecommunication channel may be connected at least one of the apparatusesindirectly.

In other words, even when the first apparatus and a third apparatus aredirectly connected to the communication channel and the second apparatusis connected to the third apparatus, the communication channel may beregarded as established between the first apparatus and the secondapparatus.

The second apparatus may transmit the data request message to the firstapparatus through the communication channel. The transmitting of thedata request message may be performed through a websocket communicationchannel. However, the present disclosure is not limited thereto, and thedata request message may be transmitted by other means.

The second apparatus may transmit a data request message to the firstapparatus in response to receiving a data notification message from thefirst apparatus. In other words, when the first apparatus acquires datato be transmitted to the second apparatus, the first apparatus maytransmit a notification message indicating that the data is acquired tothe second apparatus. The second apparatus may receive the notificationmessage and transmit the data request message on the basis of thenotification message. The second apparatus may transmit the data requestmessage in consideration of a state of the second apparatus.

The second apparatus may repeatedly transmit the data request message tothe first apparatus. The data request message may be repeatedlygenerated a predetermined number of times. For example, the data requestmessage may be transmitted at first transmission intervals during afirst time period and at second transmission intervals during a secondtime period. In this case, it is possible to prevent a waste ofresources due to an excessive data request action by setting the secondtransmission interval to be longer than the first transmission interval.

When the first apparatus and the second apparatus are directly connectedto the communication channel, the data request message may betransmitted from the second apparatus to the first apparatus. When thefirst apparatus and the second apparatus are indirectly connectedthrough the third apparatus, that is, when a communication channel isestablished between the first apparatus and the third apparatus, thedata request message may be transmitted from the second apparatus to thefirst apparatus via the third apparatus. In this case, the data requestmessage may be transferred from the first apparatus to the secondapparatus via the third apparatus to which the communication channel isconnected.

The transmitting of the data on the basis of the data request messagemay denote transmitting the data from the first apparatus to the secondapparatus through the communication channel. When the first apparatus isconnected to the third apparatus through the communication channel, thetransmitting of the data may denote transmitting the data from the firstapparatus to the second apparatus via the third apparatus. In this case,the second apparatus and the third apparatus may be connected through alocal network. When the second apparatus is connected to the thirdapparatus through the communication channel, the transmitting of thedata may denote transferring the data from the first apparatus to thesecond apparatus via the third apparatus. In this case, the firstapparatus and the third apparatus may be connected through a localnetwork.

The transmitting of the data on the basis of the data request messagemay denote transmitting the data in consideration of matters affecting aprinting operation, such as apparatus state information, etc. which areincluded in the data request. The transmitting of the data on the basisof the data request message may denote transmitting the data inconsideration of apparatus identification information.

The data transmitted to the second apparatus on the basis of the datarequest message may be data for controlling operation of the secondapparatus or a peripheral apparatus connected to the second apparatus.The data may include print data for controlling a printing operation ofthe second apparatus. The data may include setting information formanaging apparatus settings of the second apparatus, identificationinformation for identifying the second apparatus, identificationinformation of a user terminal having authority to access the secondapparatus, etc.

3.2.2.1 First System

A data management method according to an embodiment of the presentdisclosure may be performed by the above-described first system, thatis, a system including a printing apparatus and a control apparatus.

The data management method according to an embodiment of the presentdisclosure may include establishing a communication channel between theprinting apparatus and the control apparatus, transmitting, by theprinting apparatus, a data request message to the control apparatus, andtransmitting, by the control apparatus, data to the printing apparatuson the basis of the data request message.

The establishing of a communication channel between the printingapparatus and the control apparatus may denote establishing a duplexasynchronous communication channel. A detailed description of thechannel may be understood as being similar to that described above.

The establishing of a websocket communication channel may be initiatedby the control apparatus transmitting a websocket handshake message tothe printing apparatus. In this case, the printing apparatus may serveas a websocket server, and the control apparatus may serve as awebsocket client.

The establishing of a websocket communication channel may be initiatedby the printing apparatus transmitting a websocket handshake message tothe control apparatus. In this case, the control apparatus may serve asa websocket server, and the printing apparatus may serve as a websocketclient.

The printing apparatus transmitting a data request message to thecontrol apparatus may comprises that the printing apparatus transmittingthe data request message through the websocket communication channel. Ageneral description of the data request message may be understood asbeing similar to that described above.

The data request message may include identification information of theprinting apparatus. The data request message may be a request forcontrol data for controlling operation of the printing apparatus. Thedata request message may be a message that requests print data forcontrolling a printing operation of the printing apparatus.

The printing apparatus may receive a notification message indicatingthat data to be provided to the printing apparatus is acquired from thecontrol apparatus and may transmit the data request message to thecontrol apparatus on the basis of the notification message. Thetransmitting of the data request message may be performed inconsideration of a state of the printing apparatus.

The notification message may be transmitted with a state data requestmessage regarding the printing apparatus. The printing apparatus maytransmit both of the data request message and state data to the controlapparatus in response to a message originating from the controlapparatus. It is possible to realize efficient data communication bysimultaneously performing a data request and a data transmission, asdescribed above.

The control apparatus transmitting the data may denote that the controlapparatus transmits the data through the websocket channel. A generaldescription of the transmitting of the data on the basis of the datarequest message may be understood as being similar to that describedabove.

The transmitting of the data on the basis of the data request messagemay be performed in consideration of identification information of theprinting apparatus, a state of the printing apparatus, etc. The data maybe print data for controlling a printing operation of the printingapparatus. The print data may include control information associatedwith the printing operation such as printed content, a printed paper, aprinting environment, a printing time, etc. The transmitted data may beprovided in a format understandable by the printing apparatus.

The data management method according to an embodiment of the presentdisclosure may include establishing a communication channel between theprinting apparatus and the control apparatus, transmitting, by thecontrol apparatus, a data request message to the printing apparatus, andtransmitting, by the printing apparatus, data to the control apparatuson the basis of the data request message. In this embodiment, theestablishing of a communication channel may be understood as beingsimilar to those described in the above embodiments.

The control apparatus may transmit the data request message to theprinting apparatus through the websocket channel. A general descriptionof the transmitting of a data request message may be understood as beingsimilar to that described above.

The data request message transmitted to the printing apparatus by thecontrol apparatus may be a message that requests state information ofthe printing apparatus. The data request message may be a message thatrequests information regarding whether to perform a printing operationof the printing apparatus or information regarding a result ofperforming the printing operation of the printing apparatus.

The control apparatus transmitting the data request message to theprinting apparatus may denote that the control apparatus receives anotification message indicating that data to be provided to the controlapparatus is acquired from the printing apparatus and transmits the datarequest message to the printing apparatus in response to thenotification message.

When the printing apparatus transmits the notification message to thecontrol apparatus, the printing apparatus may also transmit a controldata request message. In this case, the control apparatus may transmitboth of the data request message and the control data to the printingapparatus in response to the message.

The data request message may be transmitted from the control apparatusto the printing apparatus directly or via a separate server apparatus.

The printing apparatus may transmit data to the control apparatusthrough the websocket channel.

The data transmitted from the printing apparatus to the controlapparatus may include state information of the printing apparatus. Thedata may include information regarding a printing operation status or aprinting operation result of the printing apparatus. The transmitteddata may be provided in a format understandable by the printingapparatus. The transmitted data may be provided in a formatunderstandable by the control apparatus.

The data may be transmitted from the printing apparatus to the controlapparatus directly or via a separate server apparatus.

3.2.2.2 Second System

A data management method according to an embodiment of the presentdisclosure may be performed by the above-described second system. Thatis, the data management method may be implemented by a system includinga printing apparatus, a control apparatus, and a peripheral apparatus.The peripheral apparatus may be a secondary printing apparatus.

The data management method according to an embodiment of the presentdisclosure may include establishing a communication channel between theprinting apparatus and the control apparatus, transmitting, by theprinting apparatus, a data request message to the control apparatus,transmitting, by the control apparatus, data to the printing apparatus,and transmitting, by the printing apparatus, data to the peripheralapparatus.

The establishing of a communication channel between the printingapparatus and the control apparatus, the transmitting, by the printingapparatus, of a data request message to the control apparatus, and thetransmitting, by the control apparatus, of data to the printingapparatus may be understood as being similar to those described abovefor the first system.

The printing apparatus transmitting a data request message to thecontrol apparatus may denote that the printing apparatus receives anotification message indicating that control data for the peripheralapparatus is acquired from the control apparatus and then transmits thedata request message in response to the notification message.

The notification message may be transmitted with a message that requestsstate data of the peripheral apparatus. In this case, the printingapparatus may transmit both of a message that requests control data ofthe peripheral apparatus and the state data to the control apparatus inresponse to the message.

The data request message transmitted from the printing apparatus to thecontrol apparatus may include identification information of theperipheral apparatus. The data request message may includeidentification information of the secondary printing apparatus.

The data transmitted from the control apparatus to the printingapparatus may be data for controlling the peripheral apparatus. The datamay be data for controlling the secondary printing apparatus.

The data management method according to an embodiment of the presentdisclosure may include establishing a communication channel between theprinting apparatus and the control apparatus, transmitting, by thecontrol apparatus, a data request message to the printing apparatus, andtransmitting, by the printing apparatus, data to the control apparatus.

The establishing of a communication channel between the printingapparatus and the control apparatus, the transmitting, by the controlapparatus, of a data request message to the printing apparatus, and thetransmitting, by the printing apparatus, of data to the controlapparatus may be mostly understood as being similar to those describedabove for the first system.

The transmitting, by the printing apparatus, of data to the controlapparatus may include the printing apparatus acquiring data from theperipheral apparatus connected thereto and transmitting the acquireddata to the control apparatus.

The data request message transmitted from the control apparatus to theprinting apparatus may be a message that requests state data of theperipheral apparatus. The data request message may be a message thatrequests state data of the secondary printing apparatus.

The data transmitted from the printing apparatus to the controlapparatus may be state data of the peripheral apparatus. The data may bestate data of the secondary printing apparatus. The state data may beoperation state information, network connection state information,operation availability information, etc. of the peripheral apparatus orthe secondary printing apparatus.

Operation of the printing apparatus, the control apparatus, and theperipheral apparatus will be described below in detail.

3.2.3 Operation of Each Apparatus

3.2.3.1 Control Apparatus

The data management method according to an embodiment of the presentdisclosure may be performed by a control apparatus. The data managementmethod of the control apparatus according to an embodiment of thepresent disclosure may include establishing a communication channel withan external apparatus, transmitting a data request message to theexternal apparatus, and receiving data from the external apparatus.

The control apparatus may be understood as being implemented similarlyto the external control apparatuses of the above-described first andsecond systems, unless specially stated otherwise.

A detailed description of the control apparatus establishing acommunication channel with the external apparatus may be understood asbeing similar to that described above for the first printing process.The control apparatus establishing a communication channel with theexternal apparatus may denote that the control apparatus establishes awebsocket communication channel. The establishing of a websocketcommunication channel may be initiated by the control apparatustransmitting a handshake message to the external apparatus. In thiscase, the control apparatus may function as a websocket client. Theestablishing of a websocket communication channel may be initiated bythe control apparatus receiving a handshake message from the externalapparatus. In this case, the control apparatus may function as awebsocket server.

The control apparatus transmitting a data request message to theexternal apparatus may denote that the control apparatus transmits thedata request message through the websocket communication channel. Adetailed description of the data request message may be understood asbeing similar to that described above.

The control apparatus transmitting a data request message to theexternal apparatus may denote that the control apparatus receives a dataacquisition notification message from the external apparatus andtransmits the data request message in response to the data acquisitionnotification message. The transmitting of a data request message maydenote transmitting the data request message in consideration of a stateof the control apparatus. The transmitting of a data request message maydenote transmitting a message that requests state information of aperipheral apparatus connected to the external apparatus. However, thepresent disclosure is not limited thereto, and the control apparatus maytransmit the data request message to the external apparatus withoutreceiving the data acquisition notification message.

For example, the control apparatus transmitting a data request messageto the external apparatus may denote that the control apparatustransmits a message that requests state data of the printing apparatusor the peripheral apparatus to the printing apparatus. The transmittingof a data request message may denote receiving a notification messageindicating that state data of the printing apparatus or the peripheralapparatus is acquired from the printing apparatus and transmitting thedata request message in response to the notification message.

The receiving of data from the external apparatus may denote receivingdata transmitted on the basis of the data request message from theexternal apparatus. The data may be state data of the external apparatustransmitted on the basis of the message that requests state data.

The state data may include state information of the printing apparatusor state information of the peripheral apparatus connected to theprinting apparatus. The state data may include connection information,available information, network connection information, operationperforming information, etc. of the printing apparatus or the peripheralapparatus.

The data management method of the control apparatus according to anembodiment of the present disclosure may include establishing acommunication channel with an external apparatus, receiving a datarequest message from the external apparatus, and transmitting data tothe external apparatus.

A detailed description of the establishing of a communication channelmay be understood as being similar to those described in the aboveembodiments.

The control apparatus acquiring a data request message from the externalapparatus may denote that the control apparatus receives the datarequest message through the websocket communication channel. A detaileddescription of the data request message may be understood as beingsimilar to that described above.

The data management method according to this embodiment may furtherinclude acquiring, by the control apparatus, control data forcontrolling the external apparatus and transmitting, by the controlapparatus, an acquisition notification message of the control data tothe external apparatus before the receiving, by the control apparatus,of the data request message.

The control apparatus acquiring a data request message from the externalapparatus may denote that the control apparatus transmits a dataacquisition notification message to the external apparatus and acquiresthe data request message in response to the data acquisitionnotification message. However, the present disclosure is not limitedthereto, and the control apparatus may acquire the data request messagewithout transmitting the data acquisition notification message.

The data request message may be a control data request message forrequesting a control data to control the external apparatus or aperipheral apparatus connected to the external apparatus. The datarequest message may include identification information of the externalapparatus, operation state information of the external apparatus, etc.

For example, the data request message may be a control data requestmessage for requesting a control data to control a controlling operationof the printing apparatus. The control apparatus acquiring the controldata request message from the printing apparatus may denote acquiringcontrol data to be transmitted to the printing apparatus, transmitting acontrol data acquisition notification message to the printing apparatus,and acquiring the control data request message in response to thecontrol data acquisition notification message.

As another example, the data request message may be a control datarequest message of controlling operation of the peripheral apparatus.The control apparatus acquiring a peripheral apparatus control datarequest message from the printing apparatus may denote that the controlapparatus acquires peripheral apparatus control data, transmits aperipheral apparatus control data acquisition notification message tothe printing apparatus, and acquires the peripheral apparatus controldata request message in response to the peripheral apparatus controldata acquisition notification message.

The control data request message may include identification informationof the printing apparatus, identification information of peripheralapparatus connected to the printing apparatus, identificationinformation of the secondary printing apparatus, operation stateinformation of the printing apparatus, operation state information ofthe peripheral apparatus, etc.

The control data may include control information for controlling theprinting apparatus or the peripheral apparatus. The control data mayinclude print data for controlling a printing operation of the printingapparatus or the secondary printing apparatus. The control data maycontrol the peripheral apparatus or the like to acquire an externalinput.

The control apparatus transmitting data to the external apparatus maydenote that the control apparatus transmits the data on the basis of thedata request message acquired from the external apparatus. Thetransmitting of the data on the basis of the data request message may beperformed in consideration of state information of the externalapparatus, identification information of the external apparatus, etc.,which are included in the data request message. For example, when theexternal apparatus is in a state capable of receiving an external input,the control apparatus may transmit control data for controlling theexternal apparatus to receive the external input to the externalapparatus.

More specifically, the transmitting of the data may denote transmittingthe control data on the basis of the control data request messageacquired from the printing apparatus. The transmitting of the controldata on the basis of the control data request message may be performedin consideration of identification information of the printingapparatus, identification information of a peripheral apparatus, forexample, a secondary printing apparatus connected to the printingapparatus, operation state information of the printing apparatus,operation state information of the peripheral apparatus, etc. which areincluded in the control data request message.

For example, when the printing apparatus is in a state capable ofperforming the printing operation, the control apparatus may transmitcontrol data indicating the printing operation to the printingapparatus. As another example, the control apparatus may transmitcontrol data indicating an appropriate printing operation to theprinting apparatus in consideration of the identification information ofthe printing apparatus or the secondary printing apparatus.

Like the above-described external control apparatus, the controlapparatus may include a communication unit, a control unit, and an inputreception unit.

The control apparatus may transmit a data request message to theprinting apparatus by means of the communication unit. The controlapparatus may receive the data request message from the printingapparatus by means of the communication unit.

The control apparatus may transmit a data acquisition notificationmessage to the printing apparatus by means of the communication unit.The control apparatus may acquire the data acquisition notificationmessage from the printing apparatus by means of the communication unit.

The control unit may perform the above-described data management bymeans of the input reception unit, the communication unit, the controlunit, etc.

The control unit may establish a communication channel with an externalapparatus by means of the communication unit, transmit a data requestmessage to the external apparatus, and receive data from the externalapparatus. The control unit may establish a communication channel withan external apparatus by means of the communication unit, receive a datarequest message from the external apparatus, and transmit data to theexternal apparatus.

The data management method of the control unit may be similar to thatdescribed above.

3.2.3.2 Printing Apparatus

The data management method according to an embodiment of the presentdisclosure may be performed by a printing apparatus. The data managementmethod of the printing apparatus according to an embodiment of thepresent disclosure may include establishing a communication channel withan external apparatus, transmitting a data request message to theexternal apparatus, and receiving data from the external apparatus.

The printing apparatus may receive data from the external apparatus andmay perform a printing operation or process the data. In a POS system,the printing apparatus may be a POS printer configured to receiveinformation from a POS host and perform the printing operation. Theexternal apparatus may be a peripheral apparatus connected to theprinting apparatus. The external apparatus may be a secondary printingapparatus connected to the printing apparatus.

The printing apparatus may be a hub printing apparatus to which at leastone peripheral apparatus is connected. The peripheral apparatus may be asecondary printing apparatus. The hub printing apparatus may acquirecontrol data from an external apparatus and transfer the acquiredcontrol data to the peripheral apparatus. The hub printing apparatus maytransmit data to the peripheral apparatus or perform the printingoperation.

The printing apparatus establishing a communication channel with anexternal control apparatus may be understood as being similar to thosedescribed in the above described embodiments. The printing apparatus mayestablish a websocket communication channel with the external controlapparatus.

The printing apparatus transmitting a data request message to theexternal control apparatus may denote that the printing apparatustransmits the data request message through the websocket channel. Adetailed description of the data request message may be understood asbeing similar to that described above.

The printing apparatus transmitting a data request message to theexternal control apparatus may denote that the printing apparatusreceives a data acquisition notification message from the externalcontrol apparatus and transmits the data request message in response tothe data acquisition notification message. The printing apparatus maytransmit a data request message to the external control apparatus inconsideration of a state of the printing apparatus or a peripheralapparatus connected to the printing apparatus.

For example, the data request message transmitted to the externalcontrol apparatus by the printing apparatus may be a message thatrequests print data for controlling a printing operation of the printingapparatus. The printing apparatus transmitting a data request messagemay denote receiving a print data acquisition notification message fromthe external control apparatus and transmitting a print data requestmessage in response to the print data acquisition notification message.

As another example, the data request message transmitted to the externalcontrol apparatus by the printing apparatus may be a message thatrequests control data for controlling operation of the peripheralapparatus connected to the printing apparatus. The printing apparatustransmitting a peripheral apparatus control data request message maydenote that the printing apparatus receives an acquisition notificationmessage of data for controlling the peripheral apparatus from theexternal control apparatus and transmits the peripheral apparatuscontrol data request message in response to the acquisition notificationmessage. The control data request message and the control data may beunderstood as being similar to those described in the above embodiments.

The printing apparatus receiving the data may denote that the printingapparatus receives the data transmitted on the basis of the data requestmessage. The data may be control data for controlling the printingapparatus or a peripheral apparatus connected to the printing apparatusaccording to the control data request message.

The printing apparatus may be a hub printing apparatus. When theprinting apparatus is a hub printing apparatus, the data request messagemay be a message that requests the control data for controlling theperipheral apparatus. The data may be the control data for controllingthe peripheral apparatus.

A data management method of the printing apparatus according to anotherembodiment of the present disclosure may include establishing acommunication channel with an external apparatus, acquiring a datarequest message from the external apparatus, and transmitting data tothe external apparatus. The external apparatus may be an externalcontrol apparatus. For example, the external control apparatus may be aPOS host.

The printing apparatus establishing a communication channel with anexternal control apparatus may be understood as being similar to thosedescribed in the above described embodiments.

The printing apparatus acquiring a data request message from theexternal control apparatus may be understood as being similar to thosedescribed in the above described embodiments.

The printing apparatus acquiring a data request message from theexternal control apparatus may denote that the printing apparatustransmits a data acquisition notification message to the externalcontrol apparatus and acquires the data request message in response tothe data acquisition notification message. The printing apparatustransmitting a data acquisition notification message to the externalcontrol apparatus may denote that printing apparatus transmits a statedata acquisition notification message to the external control apparatuswhen the printing apparatus acquires state data of the print data or aperipheral apparatus connected to the printing apparatus.

For example, the printing apparatus acquiring a data request messagefrom the external control apparatus may denote that the printingapparatus acquires state data of the printing apparatus or a peripheralapparatus connected to the printing apparatus, transmits the state dataacquisition notification message to the external control apparatus, andreceives the state data request message from the external controlapparatus in response to the state data acquisition notificationmessage.

Detailed descriptions of the state data and the state data requestmessage may be understood as being similar to those described in theabove embodiments.

The printing apparatus transmitting data to the external controlapparatus may denote that the printing apparatus transmits the data onthe basis of the data request message. The transmitting of the data onthe basis of the data request message may denote transmitting the datain consideration of state information of the printing apparatus or aperipheral apparatus connected to the printing apparatus. Thetransmitting of the data on the basis of the data request message may beperformed in consideration of state information of an apparatusindicated by the data request message, external input informationacquired from the peripheral apparatus or the like.

The printing apparatus may be a hub printing apparatus.

When the printing apparatus is a hub printing apparatus, the hubprinting apparatus may acquire a data request message from the externalcontrol apparatus and transmit peripheral apparatus data to the externalcontrol apparatus. More specifically, the hub printing apparatus mayacquire peripheral apparatus data from the peripheral apparatus,identify the peripheral apparatus data according to the data requestmessage, and transmit the identified peripheral apparatus data to theexternal control apparatus.

When the printing apparatus is a hub printing apparatus, the datarequest message may be a message that requests state information of theperipheral apparatus. The data request message may be a message thatrequests information that is received by the peripheral apparatus.

When the printing apparatus is a hub printing apparatus, the data isdata acquired from the peripheral apparatus and may be peripheralapparatus state data, peripheral apparatus input data, or the like.

The printing apparatus may include a communication unit, a control unit,a memory unit, and a printing unit.

The communication unit may establish a communication channel with anexternal apparatus and perform data communication. The printingapparatus may transmit a data request message to the control apparatusby means of the communication unit. The printing apparatus may receive adata request message from the control apparatus by means of thecommunication unit.

The printing apparatus may transmit a data acquisition notificationmessage to the control apparatus by means of the communication unit. Theprinting apparatus may acquire a data acquisition notification messagefrom the control apparatus by means of the communication unit.

The printing apparatus may perform the printing operation by means ofthe printing unit. The printing apparatus may perform a printingoperation by means of the printing unit on the basis of the acquiredprint data. In this case, the print data may be generated by theexternal apparatus and written in a format interpretable by the printingapparatus. The print data may be provided in a format processible by theprinting apparatus.

The control unit may perform the above-described data management bymeans of the communication unit, the control unit, the memory unit, theprinting unit, etc.

The control unit may establish a communication channel with an externalapparatus by means of the communication unit, transmit a data requestmessage to the external apparatus, and receive data from the externalapparatus. The control unit may establish the communication channel withthe external apparatus by means of the communication unit, acquire adata request message from the external apparatus, and transmit data tothe external apparatus.

The data management method of the control unit may be similar to thatdescribed above.

For example, the control unit may control the communication unit toestablish a websocket communication channel with the external apparatus,request the print data for printing to the external apparatus throughthe websocket communication channel by means of the communication unit,acquire the print data from the external apparatus through the websocketcommunication channel in response to the requesting the print data bymeans of the communication unit, and perform a printing operation on thebasis of the acquired print data by means of the printing unit.

The control unit transmitting the data request message may denote thatthe control unit acquires an event for requesting state information ofthe printing apparatus from the external apparatus by means of thecommunication unit and transmits a data request message including thestate information of the printing apparatus in response to the event forrequesting state information.

The control unit may establish a second websocket communication channelwith the external apparatus by means of the communication unit andacquire control data other than the print data as data for controlling astate of the printing apparatus through the second websocketcommunication channel.

3.2.3.3 Peripheral Apparatus

The data management method according to an embodiment of the presentdisclosure may be performed by a peripheral apparatus. The datamanagement method according to an embodiment of the present disclosuremay include transmitting, by the peripheral apparatus, a data requestmessage to an external apparatus and acquiring, by the peripheralapparatus, data from the external apparatus.

The peripheral apparatus may receive control data from the externalapparatus and perform operation on the basis of the control data. Theperipheral apparatus may acquire state information and transmit theacquired state information to the external apparatus. The peripheralapparatus may acquire an external input.

In the above-described POS system, the peripheral apparatus may be aperipheral apparatus connected to the POS system. The peripheralapparatus may include a barcode reader, a card reader, a microphone, asignature pad, etc.

The peripheral apparatus transmitting a data request message may denotethat the peripheral apparatus receives a data acquisition notificationmessage from the external apparatus and transmits the data requestmessage in response to the data acquisition notification message. Theacquiring of an acquisition notification message of the control data maydenote acquiring the acquisition notification message of the controldata generated by the external control apparatus via a hub apparatus forrelaying data (e.g., a hub printing apparatus).

The peripheral apparatus acquiring data from the external apparatus maydenote that the peripheral apparatus acquires the control data. Theperipheral apparatus acquiring data from the external apparatus maydenote that the peripheral apparatus acquires the data via the printingapparatus from an external control apparatus connected to the printingapparatus through a communication channel. The acquiring of data fromthe external apparatus may denote that the peripheral apparatustransmits a data request message including identification information ofthe peripheral apparatus to the printing apparatus and receives controldata allocated to the peripheral apparatus in response to the datarequest message.

A data management method of the peripheral apparatus according to anembodiment of the present disclosure may include receiving a datarequest message from an external apparatus and transmitting data to theexternal apparatus on the basis of the data request message.

The peripheral apparatus receiving a data request message from theexternal apparatus may denote that the peripheral apparatus transmits adata acquisition notification message to the external apparatus andreceives a data request message transmitted in response to the dataacquisition notification message. The peripheral apparatus may transmitthe data acquisition notification message through a hub apparatus forrelaying the data.

The peripheral apparatus transmitting data to the external apparatus maydenote that the peripheral apparatus transmits state data of theperipheral apparatus to the external apparatus. The transmitting ofstate data may denote determining a requested state item on the basis ofthe data request message received from the external apparatus, acquiringstate information of the determined item, and transmitting the stateinformation to the external apparatus. The peripheral apparatus maytransmit data to the external apparatus through the hub apparatus forrelaying data.

The data management method according to this embodiment may furtherinclude acquiring, by the peripheral apparatus, state data before thereceiving, by the peripheral apparatus, of a data request message. Thestate data may include operational status data, operation progress dataindicating a completion rate of the operation or the like of theperipheral apparatus.

The data management method may further include transmitting, by theperipheral apparatus, a state data acquisition notification message tothe external apparatus on the basis of the acquired state data beforethe receiving, by the peripheral apparatus, of a data request message.In this case, the acquiring of the data request message may denoteacquiring a state data request message transmitted in response to thestate data acquisition notification message.

The external apparatus may be a printing apparatus (i.e., a hub printingapparatus). The printing apparatus may provide control data to theperipheral apparatus. The printing apparatus may transfer control dataacquired from the outside to the peripheral apparatus.

The peripheral apparatus may have a communication unit to communicatewith the external apparatus. The peripheral apparatus may have a controlunit to acquire data from the external apparatus, process the data, andcontrol operation of the peripheral apparatus.

The peripheral apparatus may have a touch input unit to acquire a touchinput. The peripheral apparatus may have a voice recognition unit toacquire a voice signal. The peripheral apparatus may have an imageacquisition unit to capture an image. The peripheral apparatus maytransfer the obtained data to the hub printing apparatus.

The peripheral apparatus may have a control unit. The control unit maytransmit the data request message to the external apparatus by means ofthe communication unit and acquire data from the external apparatus. Thecontrol unit may acquire a data request message from the externalapparatus by means of the communication unit and transmit data to theexternal apparatus.

The peripheral apparatus may have a barcode recognition module. Theperipheral apparatus may have a voice recognition module. The peripheralapparatus may have a camera module. The peripheral apparatus may have atouch input module. The peripheral apparatus may have an image outputmodule. The peripheral apparatus may have a card information acquisitionmodule. The peripheral apparatus may transfer the data obtained by meansof above-mentioned modules to the hub printing apparatus.

3.2.3.4 Secondary Printing Apparatus

The data management method according to an embodiment of the presentdisclosure may be performed by a secondary printing apparatus. The datamanagement method according to an embodiment of the present disclosuremay include transmitting, by the secondary printing apparatus, a datarequest message to an external apparatus and acquiring, by the secondaryprinting apparatus, data from the external apparatus.

The secondary printing apparatus transmitting a data request message maydenote that the secondary printing apparatus receives a data acquisitionmessage from the external apparatus and transmits the data requestmessage in response to the data acquisition message. For example, thesecondary printing apparatus transmitting a data request message maydenote that the secondary printing apparatus acquires an acquisitionnotification message of print data for controlling the secondaryprinting apparatus from the external apparatus and transmits the datarequest message in response to the acquisition notification message. Theacquiring of an acquisition notification message of the print data maydenote acquiring the acquisition notification message of the print datagenerated by the external control apparatus.

The secondary printing apparatus acquiring data from the externalapparatus may denote that the secondary printing apparatus acquiresprinting control data from the external apparatus. The peripheralapparatus acquiring data from the external apparatus may denote that theperipheral apparatus acquires data generated by the control apparatusvia the external apparatus from a control apparatus connected to theexternal apparatus through a communication channel. The acquiring ofdata from the external apparatus may denote that the secondary printingapparatus transmits a data request message including identificationinformation of the secondary printing apparatus to the externalapparatus or the control apparatus and receives printing control dataallocated to the secondary printing apparatus in response to the datarequest message.

The data management method according to an embodiment of the presentdisclosure may include receiving, by the secondary printing apparatus, adata request message from an external apparatus and transmitting, by thesecondary printing apparatus, data to the external apparatus.

The secondary printing apparatus receiving a data request message fromthe external apparatus may denote that the peripheral apparatustransmits a state data acquisition notification message to the externalapparatus and receives a state data request message transmitted inresponse to the state data acquisition notification message. Thesecondary printing apparatus may receive a data acquisition notificationmessage from the external apparatus through a hub apparatus for relayingdata.

The secondary printing apparatus transmitting data to the externalapparatus may denote that the secondary printing apparatus transmitsstate data of the secondary printing apparatus to the externalapparatus. The transmitting of state data may denote determining arequested state item on the basis of the data request message, acquiringstate information of the determined item, and transmitting the stateinformation to the external apparatus. The secondary printing apparatusmay transmit data to the external apparatus through the hub apparatus.

The data management method according to this embodiment may furtherinclude acquiring, by the peripheral apparatus, state data before thereceiving, by the peripheral apparatus, of a data request message. Thestate data may include operational status data or the like of theperipheral apparatus.

The data management method may further include transmitting, by theperipheral apparatus, a state data acquisition notification message tothe external apparatus on the basis of the acquired state data beforethe receiving, by the peripheral apparatus, of a data request message.In this case, the acquiring of the data request message may denoteacquiring a state data request message transmitted in response to thestate data acquisition notification message.

The external apparatus may be a printing apparatus (i.e., a hub printingapparatus). The printing apparatus may provide control data to theperipheral apparatus. The printing apparatus may transfer control dataacquired from the outside to the peripheral apparatus.

The secondary printing apparatus may receive printing control data fromthe external apparatus and perform a printing operation on the basis ofthe data. The secondary printing apparatus may acquire state data andtransmit the acquired state data to the external apparatus.

The secondary printing apparatus may have a communication unit tocommunicate with the external apparatus. The secondary printingapparatus may have a printing unit to perform the printing operation.

The secondary printing apparatus may have a control unit. The controlunit may transmit the data request message to the external apparatus bymeans of the communication unit and acquire data from the externalapparatus. The control unit may acquire a data request message from theexternal apparatus by means of the communication unit and transmit datato the external apparatus.

3.2.4 Embodiments

3.2.4.1 First Embodiment

FIG. 8 shows a flowchart illustrating a printing method according to anembodiment of the present disclosure. Referring to FIG. 8, the printingmethod performed by a printing apparatus according to an embodiment ofthe present disclosure includes establishing a websocket channel(S1100), requesting print data (S1200), acquiring, the print data(S1300), and performing a printing operation (S1400).

The printing apparatus establishing a websocket channel (S1100) maydenote that the printing apparatus transmits a handshake message forestablishing the websocket channel to an external apparatus andestablishes the websocket channel for communicating with the externalapparatus in response to transmitting the message.

The printing apparatus requesting print data (S1200) may denote that theprinting apparatus requests print data for printing to the externalapparatus through the websocket channel.

The printing apparatus requesting the print data from the externalapparatus may denote that the printing apparatus requests the print datathrough the websocket channel. Alternatively, the printing apparatusrequesting the print data from the external apparatus may denote thatthe printing apparatus requests the print data through a data requestwebsocket channel other than the websocket channel.

The printing apparatus requesting print data (S1200) may denote that theprinting apparatus transmits state information of the printing apparatusin response to the external apparatus requesting the state informationand requests the print data.

In this case, the requesting of print data may include transmittingstate information of the printing apparatus, and the state informationmay indicate whether the printing apparatus can perform the printingoperation. The state information may indicate whether it is possible forthe printing apparatus to perform the printing operation. The stateinformation indicates status information for at least one requirementfor performing a printing operation.

The printing apparatus acquiring the print data (S1300) may denote thatthe printing apparatus acquires the print data from the externalapparatus through the websocket channel in response to the printingapparatus requesting the print data.

The printing apparatus performing a printing operation (S1400) maydenote that the printing apparatus performs the printing operation onthe basis of the acquired print data.

The print data may be generated by the external apparatus and written ina format processible by the printing apparatus. The format processibleby the printing apparatus may refer to a format that is processible bythe printing apparatus without a format conversion procedure. The formatprocessible by the printing apparatus may refer to a command formatspecific to the printing apparatus to control the printing apparatus.

3.2.4.2 Second Embodiment

FIG. 9 shows a flowchart illustrating a management method for awebsocket communication channel according to an embodiment of thepresent disclosure. Referring to FIG. 9, the management method,performed by a printing apparatus, for a websocket communication channelaccording to an embodiment of the present disclosure includesestablishing a websocket channel (S1100), requesting print data (S1200),determining whether a predetermined condition is satisfied (S1500), andcontrolling a channel duration time of the websocket channel (S1600).

The establishing of a websocket channel (S1100) and the requesting printdata (S1200) may be performed similarly to those described above withreference to FIG. 8.

The determining of whether a predetermined condition is satisfied(S1500) may denote that the printing apparatus determines that apredetermined condition associated with the acquisition of the printdata is satisfied in response to the printing apparatus requesting theprint data.

The determining of whether a predetermined condition is satisfied mayinclude determining whether the print data requested to be transmittedis received from the external apparatus. The determining of whether apredetermined condition is satisfied may include determining whether apredetermined time period has elapsed after the print data is requestedand may further include determining whether the print data is received.

The controlling of a channel duration time of the websocket channel(S1600) may denote that the printing apparatus controls the channelduration time of the websocket channel when the predetermined conditionis satisfied.

The controlling of a channel duration time of the websocket channel(S1600) may denote interrupting the websocket communication channelwithin a predetermined time period after the predetermined condition issatisfied.

FIG. 10 is a flowchart showing an operation of controlling a channelduration time of a websocket channel in a management method for awebsocket communication channel in detail according to an embodiment ofthe present disclosure.

When the predetermined condition is satisfied in the management methodfor a websocket communication channel according to an embodiment of thepresent disclosure, the printing apparatus controlling a channelduration time of the websocket channel (S1600) may denote that theprinting apparatus limits the channel duration time of the websocketchannel when the predetermined condition is satisfied (S1610). When thepredetermined condition is not satisfied, the websocket channel mayremain established (S1620).

3.2.4.3 Third Embodiment

A management method for a websocket communication channel according toan embodiment of the present disclosure may include establishing, by aprinting apparatus, a websocket channel for communicating with anexternal apparatus and requesting, by the printing apparatus, print datafor printing to the external apparatus through the websocket channel. Inthis case, the websocket channel may have a channel duration timecontrollable by the external apparatus. The external apparatus may beimplemented to determine whether a predetermined condition associatedwith an acquisition of the print data is satisfied in response toreceiving a request for the print data and control the channel durationtime depending on whether the predetermined condition is satisfied.

In other words, the management method for the websocket communicationchannel according to an embodiment of the present disclosure may includeestablishing, by an electronic apparatus, a websocket channel forcommunicating with a printing apparatus, determining, by the electronicapparatus, whether a predetermined condition associated with the requestfor print data for performing a printing operation is satisfied when theprint data is requested by the printing apparatus through the websocketchannel, and controlling, by the electronic apparatus, a channelduration time of the websocket channel when the predetermined conditionis satisfied.

3.2.4.4 Fourth Embodiment

A data management method according to an embodiment of the presentdisclosure may be implemented by a system including a control apparatus,a hub printing apparatus, and a peripheral apparatus wired to the hubprinting apparatus. In particular, a case in which the peripheralapparatus is a secondary printing apparatus and data management isperformed by the printing apparatus will be described below.

The data management method of the hub printing apparatus according tothis embodiment includes connecting to the secondary printing apparatus,establishing a websocket channel for communicating with the controlapparatus, acquiring a header from the control apparatus, requestingstate information from the secondary printing apparatus, acquiring thestate information and a print data request message from the secondaryprinting apparatus, transmitting a data request message to the controlapparatus on the basis of the print data request message, acquiringprint data from the control apparatus, and transferring the print datato the secondary printing apparatus.

When the hub printing apparatus connects to the secondary printingapparatus, the hub printing apparatus may perform the connection bytransmitting a message indicating that the connection of the hubprinting apparatus is complete to the secondary printing apparatus andacquiring an ACK message from the secondary printing apparatus. This maybe a process of enabling the secondary printing apparatus to recognizethat the secondary printing apparatus is connected to the hub printingapparatus.

The printing apparatus acquiring a header from the control apparatus maydenote that the printing apparatus acquires the header in response torequesting an operation command from the control apparatus.

The state information requested from the secondary printing apparatus bythe hub printing apparatus is intended to check whether the secondaryprinting apparatus can perform a printing operation. In other words, thestate information may include information to be considered to transmitthe print data to the secondary printing apparatus. For example, thestate information may include information regarding whether there is anoperation that is currently performed by the secondary printingapparatus, information regarding whether a printing environment isestablished, and information regarding when an operation being performedwill be complete. When the secondary printing apparatus satisfies acondition to perform the printing operation or has a state capable ofperforming the printing operation, the secondary printing apparatus maytransfer a purpose for requesting the state information and the printdata to the hub printing apparatus.

Messages for requesting the state information and the print datatransmitted from the secondary printing apparatus to the hub printingapparatus may be transmitted as independent data or may be consecutivelytransmitted together in one unit data (e.g, data packet) that istransmitted.

The data management method of the printing apparatus according to theabove embodiment may further include requesting state information fromthe secondary printing apparatus, acquiring state information of thesecondary printing apparatus from the secondary printing apparatus inresponse to the request for the state information, and transferring theacquired state information to the control apparatus.

The data management method according to this embodiment may furtherinclude closing the websocket channel after transferring the stateinformation to the control apparatus or transferring the print data tothe secondary printing apparatus. The closing of the websocket channelmay be intended to prevent inefficiency caused by maintaining thechannel even when a purpose of establishing the channel is accomplished.

The above-described data management method may be understood asperforming a printing operation using the secondary printing apparatus.When the websocket channel is closed as described above while theprinting operation is performed using the secondary printing apparatus,the above-described operations may be repeatedly performed to performthe printing operation using the secondary printing apparatus again.

A data management method implemented by a system including the controlapparatus, the hub printing apparatus, and the secondary printingapparatus connected to the hub printing apparatus, which have beendescribed above, may be similarly implemented even when the secondaryprinting apparatus is networked to the hub printing apparatus.

When the secondary printing apparatus is networked to the hub printingapparatus, the data management method according to the above embodimentmay further include checking establishment of a network port with thesecondary printing apparatus and acquiring an ACK message for theestablishment of the network port from the secondary printing apparatusafter a print data request message is acquired.

3.3 Control of Channel Duration Time

When the printing method or the like according to the present disclosureis performed, data communication may be performed using theabove-described websocket communication channel. In this case, thehandling of the communication channel when data is transmitted using thewebsocket communication channel or when there is no data to betransmitted will be described below.

3.3.1 Control Process for Channel Duration Time

In a case in which data is transmitted through a communication channelin the printing method or the like according to the present disclosure,there is an issue about the handling of the communication channel afterthe data is transmitted. In this regard, for the above-described duplexasynchronous communication channel, for example, a websocket channel, itis common for data to be transmitted at any time and for thecommunication channel to remain established even after the datatransmission. In this case, the maintenance of the communication channeleven when no data is moved may cause waste of resources.

It is possible to efficiently operate the communication channel bycontrolling an interruption time point of the communication channel. Inparticular, when data having a relatively low need for continuouscommunication data is handled, it may be efficient for a communicationchannel to be closed after the data is transmitted and re-establishedwhen data to be transmitted is generated. To this end, the interruptiontime point of the communication channel may be appropriately determined.The interruption time point of the communication channel may refer to atime point at which the communication channel is closed or a time pointat which the communication channel closure massage sent.

A communication channel management method for efficiently operating acommunication channel when no data transmission is predicted will bedescribed below.

3.3.2 System Operation

The communication channel management method according to an embodimentof the present disclosure may be performed by a system including a firstapparatus and a second apparatus. The communication channel managementmethod according to an embodiment of the present disclosure may includeestablishing a communication channel between the first apparatus and thesecond apparatus, transmitting, by the second apparatus, a data requestmessage to the first apparatus, and controlling, by the secondapparatus, a channel duration time of the communication channel.

The establishing of a communication channel between the first apparatusand the second apparatus may be understood as being similar to thosedescribed in the above embodiments. The communication channel may be awebsocket communication channel. The establishment of the communicationchannel may be initiated by the first apparatus or the second apparatustransmitting a handshake message.

The transmitting, by the second apparatus, of transmitting a datarequest message to the first apparatus may be understood as beingsimilar to those described in the above embodiments. The secondapparatus transmitting the data request message may denote that thesecond apparatus receives a data acquisition notification message fromthe first apparatus and transmits the data request message to the firstapparatus in response to the data acquisition notification message. Thedata request message may be transmitted multiple times.

The second apparatus controlling a channel duration time of thecommunication channel may denote that the second apparatus control aclosing time point (or an interruption time point) of the communicationchannel. The controlling of a closing time point may include determininga reference time point for controlling the channel duration time and areference time period, which is a time period from the reference timepoint to a time point at which the communication channel is closed. Thesecond apparatus controlling a channel duration time of thecommunication channel may denote that the second apparatus controls aretention time of the communication channel.

The controlling, by the second apparatus, of a channel duration time ofthe communication channel may include determining whether apredetermined condition is satisfied and restricting the channelduration time of the communication channel when the condition issatisfied. The restricting the channel duration time may refers tolimiting the channel duration time. The restricting or limiting thechannel duration time can be understood to determining the closingtiming of the channel. The closing timing of the channel may bedetermined in consideration of the open timing of the channel.

The determining of whether a predetermined condition is satisfied maydenote that the second apparatus determines whether reception of datafrom the first apparatus is complete in response to the data requestmessage. When the second apparatus finishes receiving data from thefirst apparatus, the second apparatus may restrict the channel durationtime of the communication channel. The determining of whether receptionof data from the first apparatus is complete may be performed accordingto a conventional method. For example, the determining of whetherreception of data from the first apparatus may be performed byidentifying an end packet included in the data received from the firstapparatus.

The determining of whether a predetermined condition is satisfied maydenote that the second apparatus determines whether a certain time haselapsed after the second apparatus transmits the data request message tothe first apparatus. In this case, when a certain time has elapsed afterthe second apparatus transmits the data request message, the secondapparatus may restrict the channel duration time of the communicationchannel.

When the second apparatus repeatedly transmits the data request messageto the first apparatus, the determining of whether a predeterminedcondition is satisfied may denote that the second apparatus determineswhether the number of times the second apparatus transmits the datarequest messages to the first apparatus exceeds a reference number. Inthis case, when the number of times the second apparatus transmits thedata request message to the first apparatus exceeds the referencenumber, the second apparatus may restrict the channel duration time ofthe communication channel.

The restricting of the channel duration time of the communicationchannel when the condition is satisfied may include closing thecommunication channel. The closing of the communication channel may beperformed by the second apparatus transmitting a closure request forclosing the communication channel to the first apparatus.

The closing of the communication channel may denote closing thecommunication channel after a certain time has elapsed after thecondition is satisfied.

The restricting of the channel duration time of the communicationchannel may denote closing the communication channel for a certain timeand then resuming the communication channel. In other words, when anyone of the above-described conditions is satisfied, the second apparatusmay determine that a possibility that data will be transmitted from thefirst apparatus is low. When the possibility that data will betransmitted from the first apparatus is low, the second apparatus mayinterrupt the establishment of the communication channel for a certaintime. The possibility that data will be transmitted from the firstapparatus may be determined in consideration of the time elapsed afterthe second apparatus requesting the data to the first apparatus.

The channel management method according to an embodiment of the presentdisclosure may include establishing a communication channel between thefirst apparatus and the second apparatus, transmitting, by the secondapparatus, a data request message to the first apparatus, andcontrolling, by the first apparatus, a channel duration time of thecommunication channel.

The establishing of a communication channel between the first apparatusand the second apparatus may be understood as being similar to thosedescribed in the above embodiments. The communication channel may be awebsocket communication channel. The transmitting, by the secondapparatus, of transmitting a data request message to the first apparatusmay be understood as being similar to those described in the aboveembodiments.

The controlling, by the first apparatus, of a channel duration time ofthe communication channel may include determining whether apredetermined condition is satisfied and controlling the channelduration time of the communication channel when the condition issatisfied.

The determining of whether a predetermined condition is satisfied maydenote that the first apparatus determines whether data to betransmitted to the second apparatus is acquired on the basis of the datarequest message received from the second apparatus. In this case, whenno data to be transmitted to the second apparatus is acquired, thesecond apparatus may restrict the channel duration time of thecommunication channel.

The determining of whether data to be transmitted to the secondapparatus is acquired may denote acquiring identification information ofthe second apparatus from the data request message and performing thedetermination in consideration of the identification information of thesecond apparatus. The determining of whether data to be transmitted tothe second apparatus is acquired may denote determining a requested datatype from the data request message and determining whether data of therequested data type is acquired.

The determining of whether a predetermined condition is satisfied maydenote restricting the channel duration time of the communicationchannel when the first apparatus receives the data request message areference number of times or more while the first apparatus transmitsthe data request message to the second apparatus multiple times.

The controlling of the channel duration time of the communicationchannel may be understood as being similar to those described in theabove embodiments. The controlling of the channel duration time of thecommunication channel may include closing the communication channel. Theclosing of the communication channel may denote closing the websocketcommunication channel. The restricting of the channel duration time ofthe communication channel may denote closing the communication channelfor a certain time and then resuming the communication channel.

3.3.2.1 First System

A communication channel management method according to an embodiment ofthe present disclosure may be performed by the above-described firstsystem. The communication channel management method according to anembodiment of the present disclosure may include establishing acommunication channel between a control apparatus and a printingapparatus, transmitting, by the printing apparatus, a data requestmessage to the control apparatus, and controlling, by the printingapparatus, a channel duration time of the communication channel.

The establishing of a communication channel between a control apparatusand a printing apparatus and the transmitting, by the printingapparatus, of a data request message to the control apparatus may beimplemented similarly to those described in the above embodiments. Theprinting apparatus may receive a data acquisition notification messagefrom the control apparatus and transmit the data request message. Theprinting apparatus may transmit the data request message to the controlapparatus multiple times.

The controlling, by the printing apparatus, of a channel duration timeof the communication channel may include determining whether apredetermined condition is satisfied and restricting the channelduration time of the communication channel when the condition issatisfied.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus determines whether reception of datafrom the control apparatus is complete in response to the data requestmessage. When the reception of data is complete, the printing apparatusmay restrict the channel duration time of the communication channel. Thedetermining of whether the reception of data is complete may beperformed according to a conventional technique.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus determines whether a certain time haselapsed after the printing apparatus transmits the data request messageto the control apparatus. When a reference time has elapsed after theprinting apparatus transmits the data request message, the printingapparatus may restrict the channel duration time of the communicationchannel. The determining of whether a certain time has elapsed may beimplemented by determining whether a certain time has elapsed withoutreceiving a response message regarding the data request message afterthe printing apparatus transmits the data.

When the printing apparatus transmits the data request message to thecontrol apparatus multiple times, the determining of whether apredetermined condition is satisfied may include the printing apparatusdetermining whether the number of times the printing apparatus transmitsthe data request messages to the control apparatus exceeds a referencenumber. When the number of times the printing apparatus transmits thedata request message to the control apparatus exceeds the referencenumber, the printing apparatus may restrict the establishment of thecommunication channel.

The restricting of the channel duration time of the communicationchannel when the predetermined condition is satisfied may includeclosing the communication channel. A description of the closing of thecommunication channel may be understood as being similar to thatdescribed in the above embodiment. The closing of the communicationchannel may be performed by the printing apparatus transmitting acommunication channel closure request message to the control apparatus.

A communication channel management method according to an embodiment ofthe present disclosure may include establishing a communication channelbetween a control apparatus and a printing apparatus, transmitting, bythe printing apparatus, a data request message to the control apparatus,and controlling, by the control apparatus, a channel duration time ofthe communication channel.

The establishing of a communication channel between a control apparatusand a printing apparatus and the transmitting, by the printingapparatus, of a data request message to the control apparatus may beunderstood as being similar to those described in the above embodiments.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include determining whether apredetermined condition is satisfied and controlling the channelduration time of the communication channel when the condition issatisfied.

The determining of whether a predetermined condition is satisfied maydenote that the control apparatus determines whether data to betransmitted to the printing apparatus is acquired on the basis of thedata request message received from the printing apparatus. When no datato be transmitted to the printing apparatus is acquired, the controlapparatus may restrict the channel duration time of the communicationchannel.

The control apparatus determining whether data to be transmitted to theprinting apparatus is acquired may denote that the control apparatusacquires identification information of the printing apparatus from thedata request message and performs the determination in consideration ofthe identification information of the printing apparatus. The controlapparatus determining whether data to be transmitted to the printingapparatus is acquired may denote that the control apparatus determines arequested data type from the data request message and determines whetherdata of the requested data type is acquired.

More specifically, the control apparatus may receive the data requestmessage and acquire identification information, state information,environmental setting information, configuration setting information,etc. of the printing apparatus from the data request message. Thecontrol apparatus may determine whether data to be allocated to theprinting apparatus is acquired on the basis of the acquired informationregarding the printing apparatus.

The determining of whether a predetermined condition is satisfied maydenote that the control apparatus restricts the channel duration time ofthe communication channel when the control apparatus receives the datarequest message a reference number of times or more while the controlapparatus receives the data request message from the printing apparatusmultiple times.

The controlling of the channel duration time of the communicationchannel may be understood as being similar to those described in theabove embodiments. The controlling of the channel duration time of thecommunication channel may include closing the communication channel. Theclosing of the communication channel may be performed by the controlapparatus transmitting a communication channel closure request messageto the printing apparatus.

A communication channel management method according to an embodiment ofthe present disclosure may include establishing a communication channelbetween a control apparatus and a printing apparatus, transmitting, bythe control apparatus, a data request message to the printing apparatus,and controlling, by the control apparatus, a channel duration time ofthe communication channel.

The establishing of a communication channel between a control apparatusand a printing apparatus and the transmitting, by the control apparatus,of a data request message to the printing apparatus may be understood asbeing similar to those described in the above embodiments. The datarequest message may include state information items requested from theprinting apparatus. The data may include state information of theprinting apparatus.

The control apparatus may receive a data acquisition notificationmessage from the printing apparatus and transmit the data requestmessage to the printing apparatus. The control apparatus may transmitthe data request message to the printing apparatus multiple times.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include determining whether apredetermined condition is satisfied and restricting the channelduration time of the communication channel when the condition issatisfied.

The determining of whether a predetermined condition is satisfied maydenote that the control apparatus determines whether reception of datafrom the printing apparatus is complete in response to the data requestmessage. When the reception of data from the printing apparatus iscomplete, the control apparatus may restrict the channel duration timeof the communication channel.

The determining of whether a predetermined condition is satisfied maydenote that the control apparatus determines whether a certain time haselapsed after the control apparatus transmits the data request messageto the printing apparatus. When a reference time has elapsed after thecontrol apparatus transmits the data request message to the printingapparatus, the control apparatus may restrict the channel duration timeof the communication channel.

When the control apparatus transmits the data request message to theprinting apparatus multiple times, the determining of whether apredetermined condition is satisfied may include the control apparatusdetermining whether the number of times the control apparatus transmitsthe data request messages to the printing apparatus exceeds a referencenumber. When the number of times the control apparatus transmits thedata request message to the printing apparatus exceeds the referencenumber, the control apparatus may restrict the establishment of thecommunication channel.

The restricting of the channel duration time of the communicationchannel when the predetermined condition is satisfied may includeclosing the communication channel. A description of the closing of thecommunication channel may be understood as being similar to thatdescribed in the above embodiment.

A communication channel management method according to an embodiment ofthe present disclosure may include establishing a communication channelbetween a control apparatus and a printing apparatus, transmitting, bythe control apparatus, a data request message to the printing apparatus,and controlling, by the printing apparatus, a channel duration time ofthe communication channel.

The establishing of a communication channel between a control apparatusand a printing apparatus and the transmitting, by the control apparatus,of a data request message to the printing apparatus may be understood asbeing similar to those described in the above embodiments.

The controlling, by the printing apparatus, of a channel duration timeof the communication channel may include determining whether apredetermined condition is satisfied and controlling the channelduration time of the communication channel when the condition issatisfied.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus determines whether data to betransmitted to the control apparatus is acquired on the basis of thedata request message received from the control apparatus. When no datato be transmitted to the control apparatus is acquired, the printingapparatus may restrict the channel duration time of the communicationchannel.

The determining of whether data to be transmitted to the controlapparatus is acquired may be performed by determining requested stateitems from the data request message and determining whether stateinformation of the state items is acquired. The determining of whetherdata to be transmitted to the control apparatus is acquired may denotedetermining a requested data type from the data request message anddetermining whether data of the requested data type is acquired.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus controls the channel duration time ofthe communication channel when the printing apparatus receives the datarequest message from the control apparatus a reference number of timesor more while the control apparatus transmits the data request messageto the printing apparatus multiple times.

The controlling of the channel duration time of the communicationchannel may be understood as being similar to those described in theabove embodiments. The controlling of the channel duration time of thecommunication channel may include closing the communication channel.

3.3.2.2 Second System

A communication channel management method according to an embodiment ofthe present disclosure may be performed by the above-described secondsystem. The communication channel management method may be implementedby a system including a control apparatus, a printing apparatus, and aperipheral apparatus (e.g., a secondary printing apparatus) connected tothe printing apparatus.

The communication channel management method according to an embodimentof the present disclosure may include establishing a communicationchannel between the control apparatus and the printing apparatus,transmitting, by the printing apparatus, a data request message to thecontrol apparatus, and controlling, by the printing apparatus, a channelduration time of the communication channel.

The establishing of a communication channel between the controlapparatus and the printing apparatus and the transmitting, by theprinting apparatus, of a data request message to the control apparatusmay be understood as being similar to those described in the aboveembodiments. The data request message may include identificationinformation of the peripheral apparatus. The data may be control datafor controlling operation of the peripheral apparatus. The data may beprint data for controlling operation of the secondary printingapparatus.

The printing apparatus transmitting the data request message to thecontrol apparatus may denote that the printing apparatus acquires thedata request message from the peripheral apparatus and transmits theacquired data request message to the control apparatus. In other words,the data request message may be a message that requests data relevant tothe operation of the peripheral apparatus. The printing apparatus maytransmit the data request message multiple times.

The printing apparatus controlling the channel duration time of thecommunication channel may include determining whether a predeterminedcondition is satisfied.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus determines whether control data forcontrolling the peripheral apparatus is acquired from the controlapparatus. The printing apparatus determining whether control data forcontrolling the peripheral apparatus is acquired may denote that theprinting apparatus performs the determination in consideration ofwhether information corresponding to identification information of theperipheral apparatus is included in data received from the controlapparatus.

The printing apparatus determining whether the control data is acquiredmay denote that the printing apparatus determines whether the receptionof the control data for controlling the peripheral apparatus iscomplete.

The printing apparatus controlling the channel duration time of thecommunication channel may include closing the communication channel. Adetailed description of the closing of the communication channel may beunderstood as being similar to those described in the above embodiments.

The communication channel management method according to an embodimentof the present disclosure may include establishing a communicationchannel between the control apparatus and the printing apparatus,transmitting, by the printing apparatus, a data request message to thecontrol apparatus, and controlling, by the control apparatus, a channelduration time of the communication channel.

In the communication channel management method, the establishing of acommunication channel between the control apparatus and the printingapparatus and the transmitting, by the printing apparatus, of a datarequest message to the control apparatus may be understood as beingsimilar to those described in the above embodiments.

The printing apparatus transmitting the data request message to thecontrol apparatus may denote that the printing apparatus acquires thedata request message from the peripheral apparatus and transmits theacquired data request message to the control apparatus. In other words,the data request message may be a message that requests data relevant tothe operation of the peripheral apparatus.

The control apparatus controlling the channel duration time of thecommunication channel may include determining whether a predeterminedcondition is satisfied.

The control apparatus determining whether a predetermined condition issatisfied may denote that the control apparatus determines whether datato be transmitted to the peripheral apparatus connected to the printingapparatus is acquired on the basis of the data request message receivedfrom the printing apparatus. When no data to be transmitted to theperipheral apparatus is acquired, the control apparatus may restrict thechannel duration time of the communication channel. Here, thetransmitting of data to the peripheral apparatus may be understood asthe transmitting of data through the printing apparatus.

The control apparatus determining whether data to be transmitted to theperipheral apparatus is acquired may denote that the control apparatusacquires identification information of the peripheral apparatus from thedata request message and performs the determination in consideration ofthe identification information of the peripheral apparatus. The controlapparatus determining whether data to be transmitted to the peripheralapparatus is acquired may denote that the control apparatus determines adata type requested by the peripheral apparatus from the data requestmessage and determines whether data of the determined data type isacquired.

More specifically, the control apparatus may receive the data requestmessage and acquire identification information, state information,environmental setting information, etc. of the peripheral apparatus fromthe data request message. The control apparatus may determine whetherthere is data to be allocated to the peripheral apparatus on the basisof the acquired information regarding the peripheral apparatus.

The controlling of the channel duration time of the communicationchannel may be understood as being similar to those described in theabove embodiments. The controlling of the channel duration time of thecommunication channel may include closing the communication channel.

A communication channel management method according to an embodiment ofthe present disclosure may include establishing a communication channelbetween a control apparatus and a printing apparatus, transmitting, bythe control apparatus, a data request message to the printing apparatus,and controlling, by the printing apparatus, a channel duration time ofthe communication channel.

In the communication channel management method, the establishing of acommunication channel between a control apparatus and a printingapparatus and the transmitting, by the control apparatus, of a datarequest message to the printing apparatus may be understood as beingsimilar to those described in the above embodiments. The data requestmessage may include state information items requested from a peripheralapparatus (e.g., a secondary printing apparatus). The data may includestate information of the peripheral apparatus or state information ofthe secondary printing apparatus.

The controlling, by the printing apparatus, of a channel duration timeof the communication channel may include determining whether apredetermined condition is satisfied and restricting the channelduration time of the communication channel when the condition issatisfied.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus determines whether reception of datafrom the control apparatus is complete. The determining of whether apredetermined condition is satisfied may denote that the controlapparatus determines whether a certain time has elapsed after thecontrol apparatus transmits the data request message to the printingapparatus. The printing apparatus may control the channel duration timeof the communication channel when the reception of data from the controlapparatus is complete or when a certain time has elapsed after theprinting apparatus sends the data request message to the controlapparatus. A detailed description thereof will be understood as beingsimilar to those described in the above embodiments.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus determines whether data to betransmitted to the control apparatus is acquired on the basis of thedata request message received from the control apparatus. When no datato be transmitted to the control apparatus is acquired, the printingapparatus may restrict the channel duration time of the communicationchannel.

The determining of whether data to be transmitted to the controlapparatus is acquired may be performed by determining state items of arequested peripheral apparatus from the data request message anddetermining whether state information of the state items of theperipheral apparatus is acquired. The determining of whether data to betransmitted to the control apparatus is acquired may denote determiningwhether data corresponding to the data request message is acquired fromthe peripheral apparatus.

The restricting of the channel duration time of the communicationchannel when the predetermined condition is satisfied may includeclosing the communication channel. A description of the closing of thecommunication channel may be understood as being similar to thatdescribed in the above embodiment.

A communication channel management method according to an embodiment ofthe present disclosure may include establishing a communication channelbetween a control apparatus and a printing apparatus, transmitting, bythe control apparatus, a data request message to the printing apparatus,and controlling, by the control apparatus, a channel duration time ofthe communication channel.

The establishing of a communication channel between a control apparatusand a printing apparatus and the transmitting, by the control apparatus,of a data request message to the printing apparatus may be understood asbeing similar to those described in the above embodiments.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include determining, by the controlapparatus, whether a predetermined condition is satisfied.

The determining of whether a predetermined condition is satisfied maydenote that the control apparatus determines whether data to betransmitted to the peripheral apparatus is acquired on the basis of thedata request message received from the printing apparatus.

When no data to be transmitted to the peripheral apparatus is acquired,the control apparatus may restrict the channel duration time of thecommunication channel.

The control apparatus determining whether data to be transmitted to theperipheral apparatus is acquired may denote that the control apparatusacquires identification information of the peripheral apparatus from thedata request message and performs the determination in consideration ofthe identification information of the peripheral apparatus. Morespecifically, the control apparatus may receive the data request messageand acquire identification information, state information, environmentalsetting information, etc. of the peripheral apparatus from the datarequest message. The control apparatus may determine whether there isdata to be allocated to the peripheral apparatus on the basis of theacquired information regarding the peripheral apparatus.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include closing the communication channelwhen the condition is satisfied.

3.3.3 Operation of Each Apparatus

3.3.3.1 Control Apparatus

The communication channel management according to an embodiment of thepresent disclosure may be performed by a control apparatus. The controlapparatus may be understood as being similar to the external controlapparatus in the above-described first and second systems.

The control apparatus may have a communication unit to communicate withan external apparatus. The control apparatus may have a user input unitto acquire a user input.

The control apparatus may have a control unit. The control apparatus maymanage a communication channel by means of the control unit.

The control unit may control a channel duration time of thecommunication channel. The control unit controlling the channel durationtime of the communication channel may include determining whether apredetermined condition is satisfied. A detailed description of thepredetermined condition may be understood as being similar to thatdescribed of the communication channel management of the system.

The control unit controlling the channel duration time of thecommunication channel may include restricting the channel duration timeof the communication channel when the condition is satisfied. Therestricting of the channel duration time of the communication channelmay be performed by determining a closing time of the communicationchannel.

The controlling of the channel duration time of the communicationchannel may be performed by a channel duration time control unitincluded in the control apparatus.

The communication channel management method of the control apparatuswill be described below. The following communication channel managementmethod may be performed by the control unit by means of thecommunication unit or the like.

The communication channel management of the control apparatus methodaccording to an embodiment of the present disclosure includesestablishing a communication channel with an external apparatus,acquiring a data request message from the external apparatus, andcontrolling a channel duration time of the communication channel.

The external apparatus may be a printing apparatus. The printingapparatus may be a hub printing apparatus to which at least oneperipheral apparatus is connected. The peripheral apparatus may be asecondary printing apparatus for performing a printing operation.

The control apparatus acquiring a data request message from the externalapparatus may denote that the control apparatus acquires a data requestmessage generated by the external apparatus. The acquiring of a datarequest message from the external apparatus may denote that the controlapparatus acquires a data request message generated by a peripheralapparatus connected to the external apparatus.

The controlling of a channel duration time of the communication channelmay include the control apparatus determining whether data to betransmitted to the external apparatus is acquired. The determining ofwhether data to be transmitted to the external apparatus is acquired maydenote determining whether control data for controlling the externalapparatus or the peripheral apparatus is acquired.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include restricting the channel durationtime of the communication channel when no data to be transmitted to theexternal apparatus is acquired. The controlling, by the controlapparatus, of a channel duration time of the communication channel mayinclude restrict the channel duration time of the communication channelwhen data to be transmitted to the external apparatus is not acquired.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include, when data to be transmitted tothe external apparatus is acquired, transmitting the acquired data tothe external apparatus, determining whether the transmission iscomplete, and when the transmission is complete, restricting a channelduration time of the communication channel.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include determining whether apredetermined condition is satisfied and restricting the channelduration time of the communication channel when the predeterminedcondition is satisfied.

The control apparatus determining whether a predetermined condition issatisfied may include determining whether data for controlling theexternal apparatus or the peripheral apparatus is acquired. When thedata is not acquired, the control apparatus may restrict the channelduration time of the communication channel.

When the data for controlling the external apparatus or the peripheralapparatus is acquired, the control apparatus determining whether apredetermined condition is satisfied may include transmitting the datato the external apparatus and determining whether the transmission ofthe data is complete. When the transmission of the data is complete, thecontrol apparatus may restrict the channel duration time of thecommunication channel.

The restricting of the channel duration time of the communicationchannel may be implemented by closing the communication channel. Therestricting of the channel duration time of the communication channelmay be implemented by closing the communication channel when apredetermined time has elapsed after the condition is satisfied. Therestricting of the channel duration time of the communication channelmay be implemented by closing the communication channel during apredetermined time when the condition is satisfied.

The closing of the communication channel may be performed by the controlapparatus transmitting a channel closing message of closing thewebsocket communication channel to the external apparatus.

A communication channel management method of the control apparatusaccording to an embodiment of the present disclosure includesestablishing a communication channel with an external apparatus,transmitting a data request message to the external apparatus, andcontrolling a channel duration time of the communication channel.

The external apparatus may be a printing apparatus. The printingapparatus may be a hub printing apparatus to which at least oneperipheral apparatus is connected. The peripheral apparatus may be asecondary printing apparatus for performing a printing operation.

The control apparatus transmitting a data request message to theexternal apparatus may denote that the control apparatus transmits adata request message that requests data to the external apparatus or theperipheral apparatus.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include the control apparatus determiningwhether data is received from the external apparatus. The controlapparatus determining whether data is received from the externalapparatus may denote that the control apparatus determines whether datagenerated by the external apparatus or the peripheral apparatus isreceived from the external apparatus.

The control apparatus may restrict the channel duration time of thecommunication channel when data is received from the external apparatus.The control apparatus may restrict the channel duration time of thecommunication channel a certain time period after the reception of datais complete.

The control apparatus may restrict the channel duration time of thecommunication channel when no data is received from the externalapparatus. Here, receiving no data, by the control apparatus, from theexternal apparatus, can be understood as to include receiving datagenerally associated with formation or maintenance of the channel. Inother words, receiving no data, by the control apparatus, from theexternal apparatus, can be understood as receiving no meaningful data.Receiving no data from the external apparatus, by the control apparatus,may refer to receive no desired data from the external apparatus. When acertain time has elapsed after the control apparatus transmits the datarequest message to the external apparatus or when no data is receivedwhile control apparatus transmits the data request message apredetermined number of times, the control apparatus may determine thatno data is received from the external apparatus.

The controlling, by the control apparatus, of a channel duration time ofthe communication channel may include determining, by the controlapparatus, whether a predetermined condition is satisfied andrestricting, by the control apparatus, the channel duration time of thecommunication channel when the predetermined condition is satisfied.

The determining of whether a predetermined condition is satisfied maydenote that the control apparatus determines whether the data isreceived from the external apparatus. The determining of whether thedata is received from the external apparatus may denote determiningwhether data generated by the external apparatus or the peripheralapparatus is received by the control apparatus from the externalapparatus.

When the data is not received from the external apparatus, the controlapparatus determining whether a predetermined condition is satisfied mayinclude determining whether a predetermined time has elapsed after thedata request message is transmitted.

The restricting of the channel duration time of the communicationchannel may be implemented by closing the communication channel.

3.3.3.2 Printing Apparatus

The communication channel management according to an embodiment of thepresent disclosure may be performed by a printing apparatus. Theprinting apparatus may be a hub printing apparatus to which at least oneperipheral apparatus is connected. The printing apparatus may be handledsimilarly to the printing apparatus in the above-described first andsecond systems, unless specially stated otherwise.

The printing apparatus may have a communication unit to communicate withan external apparatus. The printing apparatus may have a printing unitto perform a printing operation.

The printing apparatus may have a control unit.

The control unit may control a channel duration time of thecommunication channel. The control unit controlling the channel durationtime of the communication channel may include determining whether apredetermined condition is satisfied.

The control unit controlling the channel duration time of thecommunication channel may include restricting the channel duration timeof the communication channel when the predetermined condition issatisfied. The restricting of the channel duration time of thecommunication channel may be performed by determining a closing time ofthe communication channel.

The control unit may determine whether a predetermined conditionassociated with an acquisition of print data is satisfied and maycontrol a channel duration time of a websocket communication channel bymeans of the communication unit.

The controlling of the channel duration time of the communicationchannel may be performed by a channel duration time control unitincluded in the printing apparatus. The channel duration time controlunit may determine the channel duration time. The channel duration timecontrol unit may determine the channel closure timing. The channelduration time control unit may determine the channel open and closureperiod.

The communication channel management method of the printing apparatuswill be described below. The following communication channel managementmethod may be performed by the control unit by means of thecommunication unit or the like.

The communication channel management method of the printing apparatusaccording to an embodiment of the present disclosure includesestablishing a communication channel with an external apparatus,transmitting a data request message to the external apparatus, andcontrolling a channel duration time of the communication channel.

The external apparatus may be an external control apparatus configuredto transmit control data to the printing apparatus.

The printing apparatus transmitting a data request message to theexternal apparatus may denote that the printing apparatus transmits adata request message generated by the printing apparatus or a datarequest message acquired from the peripheral apparatus to the externalapparatus.

The controlling of a channel duration time of the communication channelmay include the printing apparatus determining whether data is receivedfrom the external apparatus through the communication channel.

The printing apparatus may determine whether data is received andrestrict the channel duration time of the communication channel when thedata is received. The restricting of the channel duration time of thecommunication channel when the data is received may denote that theprinting apparatus restricts the channel duration time of thecommunication channel within a predetermined time period after thereception of data is complete.

When no data is received, the printing apparatus determines whether acertain time has elapsed after the data request message is transmitted.When the time has elapsed, the printing apparatus may restrict thechannel duration time of the communication channel.

The controlling of the channel duration time of the communicationchannel may include the printing apparatus determining whether apredetermined condition is satisfied. The printing apparatus mayrestrict the channel duration time of the communication channel when thepredetermined condition is satisfied.

The determining of whether a predetermined condition is satisfied mayinclude determining whether data is received through the communicationchannel.

The determining of whether a predetermined condition is satisfied mayinclude determining whether a certain time has elapsed after the datarequest message is transmitted when no data is received.

The restricting of the channel duration time of the communicationchannel may be implemented by closing the communication channel. Therestricting of the channel duration time of the communication channelmay be implemented by closing the communication channel when apredetermined time has elapsed after the condition is satisfied. Therestricting of the channel duration time of the communication channelmay be implemented by closing the communication channel during apredetermined time when the condition is satisfied.

The closing of the communication channel may be performed by the controlapparatus transmitting a channel closing message of closing thewebsocket communication channel to the external apparatus.

The communication channel management method of the printing apparatusaccording to an embodiment of the present disclosure may includeestablishing a communication channel with an external apparatus,receiving a data request message from the external apparatus, andcontrolling a channel duration time of the communication channel.

The printing apparatus receiving a data request message from theexternal apparatus may denote that the printing apparatus receives amessage that requests the data acquired from the printing apparatus or amessage that requests the data acquired from the peripheral apparatusfrom the external apparatus.

The controlling of a channel duration time of the communication channelmay include the printing apparatus determining whether data to betransmitted to the external apparatus is acquired. Whether there is datato be transmitted to the external apparatus may be determined on thebasis of the data request message received from the external apparatus.

The printing apparatus may determine whether data to be transmitted tothe external apparatus is acquired and may restrict the channel durationtime of the communication channel when the data is not received. Whenthe data is not acquired and a predetermined time has elapsed after thedata request message is received, the printing apparatus may restrictthe channel duration time of the communication channel.

The printing apparatus may determine whether data to be transmitted tothe external apparatus is acquired and may transmit the data to theexternal apparatus when the data is acquired. When the transmissionprocedure of the data is complete, the printing apparatus may restrictthe channel duration time of the communication channel.

The controlling of the channel duration time of the communicationchannel may include the printing apparatus determining whether apredetermined condition is satisfied. The printing apparatus mayrestrict the channel duration time of the communication channel when thepredetermined condition is satisfied.

The determining of whether a predetermined condition is satisfied maydenote that the printing apparatus performs the determination inconsideration of whether the data to be transmitted to the externalapparatus is acquired or when the data request message is received.

The restricting of the channel duration time of the communicationchannel may be implemented by closing the communication channel.

3.3.3.3 Peripheral Apparatus

The communication channel management according to an embodiment of thepresent disclosure may be performed by a peripheral apparatus connectedto the printing apparatus connected with the communication channel. Theperipheral apparatus may be handled similarly to the peripheralapparatus in the above-described first and second systems, unlessspecially stated otherwise.

The peripheral apparatus may have a communication unit to communicatewith the printing apparatus.

The peripheral apparatus may have a control unit. The control unit maycontrol a channel duration time of the communication channel.

The control unit controlling the channel duration time of thecommunication channel may include determining whether a predeterminedcondition is satisfied. The control unit controlling the channelduration time of the communication channel may include restricting thechannel duration time of the communication channel when thepredetermined condition is satisfied.

The communication channel management method of the peripheral apparatuswill be described below.

The communication channel management method of the peripheral apparatusaccording to an embodiment of the present disclosure includestransmitting a data request message to the printing apparatus andcontrolling a channel duration time of the communication channel.

The data request message may be ultimately transmitted to the printingapparatus or an external control apparatus connected to the printingapparatus.

The controlling of a channel duration time of the communication channelmay include determining whether data is received by the peripheralapparatus from the printing apparatus. The determining whether data isreceived from the printing apparatus may denote determining whether datagenerated by the control apparatus or the printing apparatus is receivedfrom the printing apparatus. When the data is received, the peripheralapparatus may restrict the channel duration time of the communicationchannel.

The restricting of the channel duration time of the communicationchannel may include determining whether data is received by theperipheral apparatus from the printing apparatus and restricting thechannel duration time of the communication channel when the data is notreceived.

The restricting of the channel duration time of the communicationchannel may denote closing the communication channel. The peripheralapparatus may transmit a communication channel closing request to theprinting apparatus. When the communication channel closing request istransmitted to the printing apparatus, the printing apparatus maytransmit a channel closing request message to the external controlapparatus to close the communication channel.

The communication channel management method of the peripheral apparatusaccording to an embodiment of the present disclosure includes receivinga data request message from the printing apparatus and controlling achannel duration time of the communication channel.

The data request message may be generated by the printing apparatus oran external control apparatus connected to the printing apparatus.

The controlling of a channel duration time of the communication channelmay include determining whether data to be transmitted to the printingapparatus is acquired. The determining of whether data to be transmittedto the printing apparatus is acquired may denote that the printingapparatus performs the determination on the basis of the data requestmessage received from the printing apparatus. When the data is acquired,the peripheral apparatus may transmit the data to the printingapparatus. When the transmission is complete, the peripheral apparatusmay restrict the channel duration time of the communication channel.

The peripheral apparatus may determine whether data to be transmitted tothe printing apparatus is acquired and may restrict the channel durationtime of the communication channel when the data is not received.

The restricting of the channel duration time of the communicationchannel may be implemented by closing the communication channel.

3.3.3.4 Secondary Printing Apparatus

The communication channel management according to an embodiment of thepresent disclosure may be performed by a secondary printing apparatusconnected to the printing apparatus connected with the communicationchannel.

The secondary printing apparatus may have a communication unit tocommunicate with the printing apparatus. The secondary printingapparatus may have a printing unit to perform a printing operation. Thesecondary printing apparatus may have a control unit to acquire controldata from the printing apparatus or transmit data to the printingapparatus. The control unit may control a channel duration time of thecommunication channel.

The communication channel management of the secondary printing apparatusmay be performed similar to the above-described communication channelmanagement of the peripheral apparatus.

For the communication channel management of the secondary printingapparatus, the data acquired by the secondary printing apparatus fromthe printing apparatus may be print data for controlling a printingoperation of the secondary printing apparatus.

For the communication channel management of the secondary printingapparatus, the data transmitted to the printing apparatus may beprinting operation state information of the secondary printingapparatus.

3.4 Control of Peripheral Apparatus

3.4.1 Control Process

In the printing method or the like according to the present disclosure,a method of remotely controlling an apparatus will be described below.According to the present disclosure, one apparatus may control anotherapparatus as well as a peripheral apparatus connected to the otherapparatus through a duplex asynchronous communication channel. Here, thecontrolling of an apparatus is defined as a concept that coversregistering the apparatus to be connected to a system, controllingoperation of the apparatus, disconnecting the apparatus from the system,etc.

A method of controlling another apparatus through the duplexasynchronous communication channel, for example, a websocketcommunication channel and a method of controlling a peripheral apparatusconnected to the other apparatus will be described below.

3.4.2 System Operation

An apparatus control method according to the present disclosure may beimplemented by a system including a control apparatus, a hub printingapparatus, and at least one peripheral apparatus connected to the hubprinting apparatus. Here, the control apparatus, the hub printingapparatus, and the peripheral apparatus may be handled similarly tothose of the above-described first and second systems, unless speciallystated otherwise.

The apparatus control method of the control apparatus according to anembodiment of the present disclosure may include acquiring a controltool for controlling the peripheral apparatus, establishing acommunication channel with the hub printing apparatus, and controllingthe peripheral apparatus using the control tool and the communicationchannel.

The control tool can be understood as a tool to configure a targetapparatus, a target module, target software, etc. The control tool canbe understood as a tool to set an environmental settings for a targetapparatus, a target module, a target software, etc.

The control apparatus acquiring a control tool may be understood as thecontrol apparatus acquiring a web page or a web application thatprovides a control function for the peripheral apparatus by means of aweb browser installed in the control apparatus. The acquiring of the webpage or the like may include that a control function provided thereby isactivated. The web page, the web application, etc. (hereinafter, all ofthem are regarded as included in the web application) may be connectedto the hub printing apparatus through the communication channel.

The web application may be provided by a web server included in the hubprinting apparatus. The web application may be provided by a web serverincluded in a separate server apparatus.

The control apparatus may control the peripheral apparatus not only bythe web application but also through a built-in application that ispre-installed in the control apparatus.

The control apparatus establishing a communication channel with the hubprinting apparatus may be understood as being similar to those describedin the above embodiments. The communication channel may be a duplexasynchronous communication channel. The communication channel may be awebsocket communication channel.

The control apparatus controlling the peripheral apparatus may includethe control apparatus acquiring control data for controlling theperipheral apparatus.

The control data may include registration information for identifyingand/or managing the peripheral apparatus. For example, the control datamay include information regarding a network setting, a network IPaddress of the peripheral apparatus, initial settings of the peripheralapparatus, a command format of the peripheral apparatus, etc. Thecontrol data may be apparatus information for adding the peripheralapparatus to a peripheral apparatus database managed by the control toolor apparatus information for removing the peripheral apparatus from thedatabase.

According to an embodiment of the present disclosure, the controlling,by the control apparatus, of the peripheral apparatus may includeacquiring, by the control apparatus, control data of the peripheralapparatus and transmitting, by the control apparatus, the control datato the hub printing apparatus by means of the control tool. In thiscase, the above-described websocket channel may be used to transmit thecontrol data to the hub printing apparatus.

The apparatus control method according to an embodiment of the presentdisclosure may further include acquiring, by the control tool, aresponse message regarding the transmission of the control data throughthe communication channel.

In the apparatus control method according to this embodiment, theresponse message may include result information of the printingapparatus acquiring the control data, identifying the peripheralapparatus on the basis of the control data, and registering theidentified peripheral apparatus.

In the apparatus control method according to this embodiment, theresponse message may include state data indicating a change in state ofthe peripheral apparatus due to the transmission of the control data.

The apparatus control method according to this embodiment may furtherinclude displaying, by the control tool, a control result to a user onthe basis of the acquired response message. In other words, the acquiredresponse message regarding the transmission of data or the state dataincluded in the response message may be displayed by the controlapparatus. The user may check the displayed state and determine whetherthe control or state change of the peripheral apparatus is successfullyperformed.

The controlling, by the control apparatus, of the peripheral apparatusmay include transmitting, by the control apparatus, the control data tothe printing apparatus, transmitting, by the printing apparatus, thecontrol data to the peripheral apparatus, acquiring, by the printingapparatus, a response message corresponding to the transmission of thecontrol data from the peripheral apparatus, and transferring, by theprinting apparatus, the response message to the control apparatus.

The control data may be control command for controlling operation of theperipheral apparatus. For example, the control data may include an inputcommand for instructing the peripheral apparatus to acquire an externalinput, an output command for instructing the peripheral apparatus tooutput data, a printing command for instructing the peripheral apparatusto perform a printing operation, etc.

Since the websocket communication channel may be used to handle theabove-described control data and response message, the control data andthe response message may be associated in real time in terms ofoccurrence and/or transfer thereof. Accordingly, when the peripheralapparatus is controlled using a websocket channel, it is possible toquickly transfer a control command of a user and confirm a result ofoperating the peripheral apparatus according to the control command.

3.4.3 Operation of Each Apparatus

3.4.3.1 Operation of Control Apparatus

The apparatus management method according to an embodiment of thepresent disclosure may be performed by a control apparatus. The controlapparatus may be handled similarly to the external control apparatus inthe above-described first and second systems, unless specially statedotherwise.

The apparatus management method of the control apparatus may includeacquiring, by the control apparatus, a control tool, establishing, bythe control apparatus, a communication channel with an externalapparatus, and controlling, by the control apparatus, the externalapparatus by means of the control tool.

The control apparatus acquiring a control tool may be understood asacquiring a web application or the like that is provided by a web serverincluded in the external apparatus. The control apparatus acquiring acontrol tool may denote that a control tool pre-installed in the controlapparatus is activated.

The control tool may acquire a control input from a user and transmitthe acquired control input to the external apparatus through thecommunication channel. The control tool may convert the control inputinto control data and transmit the control data to the externalapparatus. The control data may include registration information of theexternal apparatus or operational control information of the externalapparatus in order to control the external apparatus.

The control tool may receive a response message from the externalapparatus in response to transmitting the control data. The responsemessage may include state data indicating a change in state of theexternal apparatus due to the transmission of the control data. Theresponse message may include registration state information, operationalstate information, or the like of the external apparatus.

The control apparatus establishing the communication channel with theexternal apparatus may include the control apparatus and the externalapparatus not only being directly connected through the communicationchannel but also being indirectly connected to each other. Specifically,even when the control apparatus establishes the communication channelwith a predetermined hub apparatus and the external apparatus isdirectly connected with the hub apparatus, the control apparatus may beunderstood as establishing the communication channel with the externalapparatus.

The control apparatus controlling the external apparatus by means of thecontrol tool may include transmitting control data to the externalapparatus through the communication channel by means of the controltool. The controlling of the external apparatus may include receiving aresponse message regarding the transmission of the control data from theexternal apparatus through the communication channel.

The apparatus management method may further include displaying, by thecontrol apparatus, a result of the transmission of the control data. Thecontrol apparatus may acquire state information of the externalapparatus from the response message received in response to transmittingthe control data and display the acquired state information.

The control apparatus may include a communication unit, a user inputunit, a control tool unit, and a control unit. The control apparatus maybe implemented as a POS host in the above-described POS system. Theexternal apparatus may be implemented as a POS peripheral apparatus inthe above-described POS system.

The communication unit may control the external apparatus through awebsocket channel. The communication unit may acquire a web applicationor the like through a web browser pre-installed in the controlapparatus.

The user input unit may receive control information from a user andtransmit the control information to the control tool unit. The controlinformation may be registration information for managing the externalapparatus or control command information for controlling operation ofthe external apparatus.

The control tool unit may acquire a control tool and process the controldata or state data.

The control unit may perform the above-described apparatus management bymeans of the communication unit, the control tool unit, etc. The controlunit may acquire the control tool by means of a control tool managementunit, establish the communication channel by means of the communicationunit, and control an external apparatus by means of the control toolmanagement unit and the communication unit.

The control apparatus may optionally have a display unit. The displayunit may display a control state or a control result of the peripheralapparatus on the basis of the response message acquired from theexternal apparatus.

3.4.3.2 Operation of Hub Apparatus

The apparatus management method according to an embodiment of thepresent disclosure may be performed by a hub apparatus. The hubapparatus may be handled similarly to the hub printing apparatus in theabove-described first and second systems, unless specially statedotherwise.

The apparatus management method of the hub apparatus may includeestablishing a communication channel with an external apparatus,acquiring control data from the external apparatus, and controlling aperipheral apparatus using the control data.

The communication channel established between the hub apparatus and theexternal apparatus may be a websocket communication channel. The hubapparatus may acquire the control data from the external apparatusthrough the websocket communication channel.

The hub apparatus controlling the peripheral apparatus using the controldata may denote that the hub apparatus registers the peripheralapparatus using identification information of the peripheral apparatusincluded in the control data. The controlling of the peripheralapparatus may denote that the hub apparatus controls operation of theperipheral apparatus using operation control data included in thecontrol data. The controlling of a peripheral apparatus may denote thatthe hub apparatus deregisters the peripheral apparatus using theidentification information of the peripheral apparatus.

The apparatus management method of the hub apparatus may further includeproviding a web application to the external apparatus.

The hub apparatus providing a web application may be implemented by theexternal apparatus providing a web control apparatus for managing aperipheral apparatus connected to the hub apparatus. The hub apparatusmay have a web server to provide a web application stored in the webserver to the external apparatus.

The providing of a web application to the external apparatus may beperformed before or after the establishing of a communication channel.

A peripheral apparatus management method according to an embodiment ofthe present disclosure may include establishing a first websocketchannel for communicating with a peripheral apparatus control toolprovided to an external apparatus; acquiring peripheral apparatusmanagement data including peripheral apparatus identificationinformation and peripheral apparatus registration information from theperipheral apparatus control tool provided to the external apparatusthrough the first websocket channel, and registering a peripheralapparatus identified on the basis of the peripheral apparatusidentification information together with the peripheral apparatusmanagement data.

In this case, the peripheral apparatus management method may furtherinclude providing, by a hub apparatus, the peripheral apparatus controltool to the external apparatus before or after the establishing of afirst websocket channel. The peripheral apparatus control tool providedto the external apparatus may be a peripheral apparatus control toolprovided by the hub apparatus.

FIG. 11 is a flowchart showing a peripheral apparatus management methodaccording to an embodiment of the present disclosure. Referring to FIG.11, a peripheral apparatus management method of a hub apparatusaccording to an embodiment of the present disclosure may includeproviding a peripheral apparatus control tool to an external apparatus(S2100), establishing a first websocket channel (S2200), acquiringperipheral apparatus management data (S2300), and registering anidentified peripheral apparatus in a peripheral apparatus database(S2400). When the peripheral apparatus is registered in the database,the peripheral apparatus may be controlled by control data transmittedfrom the hub apparatus.

The hub apparatus providing a peripheral apparatus control tool (S2100)may denote that the hub apparatus provides a web application forcontrolling the peripheral apparatus to the external apparatus.

The hub apparatus establishing a first websocket channel (S2200) maydenote that the hub apparatus establishes the first websocket channelwith the peripheral apparatus control tool provided to the externalapparatus.

The hub apparatus acquiring peripheral apparatus management data (S2300)may denote that the hub apparatus acquires peripheral apparatusmanagement data including peripheral apparatus identificationinformation for identifying a peripheral apparatus connectable with thehub apparatus and peripheral apparatus registration information forconnecting to the peripheral apparatus and registering the peripheralapparatus from the peripheral apparatus control tool provided to theexternal apparatus through the first websocket channel. The peripheralapparatus identification information may be a network IP address of theperipheral apparatus. The peripheral apparatus identificationinformation may be information regarding a port to which the peripheralapparatus is connected. The peripheral apparatus identificationinformation may be information regarding a function executable by theperipheral apparatus.

The hub apparatus registering an identified peripheral apparatus in aperipheral apparatus database (S2400) may denote that the hub apparatusregisters a peripheral apparatus identified on the basis of theperipheral apparatus identification information in a peripheralapparatus database provided in advance together with the peripheralapparatus management data.

The registering of the peripheral apparatus in the peripheral apparatusdatabase may include matching identification information of theperipheral apparatus to any one of a command format specific to theperipheral apparatus for controlling the peripheral apparatus and anenvironmental setting value of the peripheral apparatus and registeringthe matched identification information in the peripheral apparatusdatabase.

FIG. 12 is a flowchart showing a peripheral apparatus management methodaccording to another embodiment of the present disclosure. Referring toFIG. 12, the peripheral apparatus management method according to anembodiment of the present disclosure may further include transmittingstate information of the peripheral apparatus to the external apparatus(S2500) after the registering of an identified peripheral apparatus in aperipheral apparatus database (2400).

The transmitting of state information of the peripheral apparatus to theexternal apparatus (S2500) may denote registering the peripheralapparatus and transmitting state information of the registeredperipheral apparatus such as a network connection state, executablefunction information, and the presence of an operation being performedto the external apparatus.

FIG. 13 is a flowchart showing a peripheral apparatus management methodaccording to another embodiment of the present disclosure. Referring toFIG. 13, the peripheral apparatus management method according to anembodiment of the present disclosure may further include establishing asecond websocket channel with the external apparatus (S2600) after theregistering of an identified peripheral apparatus in a peripheralapparatus database (2400). The peripheral apparatus management methodmay establish the second websocket channel in addition to the firstwebsocket channel.

When control data for controlling the registered peripheral apparatus isgenerated by the external apparatus, the second websocket channel mayacquire the control data from the external apparatus.

The second websocket channel may be interrupted when a predeterminedevent associated with the acquisition of the control data occurs. Inthis case, the predetermined event may be an event in which theacquisition of the control data is complete.

FIG. 14 is a flowchart illustrating a peripheral apparatus managementmethod according to still another embodiment of the present disclosure.Referring to FIG. 14, a peripheral apparatus management method of a hubapparatus may include providing a peripheral apparatus control tool toan external apparatus (S2100), establishing a websocket channel forcommunicating with the peripheral apparatus control tool provided to theexternal apparatus (S2700), acquiring peripheral apparatus data (S2800),and transmitting the peripheral apparatus data to a target peripheralapparatus (S2900).

The hub apparatus acquiring peripheral apparatus data (S2800) may denotethat the hub apparatus acquires peripheral apparatus control dataincluding peripheral apparatus selection information for selecting atleast one peripheral apparatus connected to the hub apparatus andcontrol command information for controlling the selected peripheralapparatus from the peripheral apparatus control tool provided to theexternal apparatus through the websocket channel. The control commandinformation may denote to a command information for targeting andcontrolling the selected peripheral apparatus. In other words, Thecontrol command information may denote to a command information forcontrolling the selected peripheral apparatus as a target peripheralapparatus.

In this case, the control command information may be generated by theexternal apparatus and may have a format interpretable by the targetperipheral apparatus. The control command information may be transmittedfrom the hub apparatus to the target peripheral apparatus without formatconversion. The control command information may have a command formatspecific to the target peripheral apparatus and may be interpreted bythe target peripheral apparatus without format conversion.

The hub apparatus transmitting the peripheral apparatus data to a targetperipheral apparatus (S2900) may denote that the hub apparatusdetermines the target peripheral apparatus on the basis of theperipheral apparatus selection information and transmits the peripheralapparatus control data to the determined target peripheral apparatus.

The determining of the target peripheral apparatus on the basis of theperipheral apparatus selection information may include acquiringperipheral apparatus registration information corresponding to theperipheral apparatus selection information from a peripheral apparatusdatabase, which is provided in advance in the hub apparatus and thatincludes identification information of at least one peripheral apparatusconnected to the hub apparatus, and determining an address to which thecontrol data from the peripheral apparatus registration information isto be transmitted.

The determining of the target peripheral apparatus on the basis of theperipheral apparatus selection information may denote acquiring anapparatus characteristic condition required for an apparatus to whichthe peripheral apparatus control data from the peripheral apparatusselection information is to be transmitted and determining a peripheralapparatus satisfying the apparatus characteristic condition from amongperipheral apparatuses connected to the hub apparatus as the targetperipheral apparatus.

In this case, the characteristic condition may include a printingcharacteristic of the apparatus, and the peripheral apparatus satisfyingthe characteristic condition may refer to a peripheral printingapparatus satisfying the printing characteristic. More specifically, thecharacteristic condition may refer to a printing attribute condition ofthe printing apparatus, such as a printable paper type, a printablepaper size, a printable font, and a printable color.

The characteristic condition may be a condition for a functionexecutable by the apparatus. The characteristic condition may be acondition for executability of a printing operation, a voice outputoperation, an image display operation, a user input acquisitionoperation, etc. of the apparatus.

According to an embodiment of the present disclosure, the hub apparatusmay include a communication unit, a memory unit, and a control unit.

The hub apparatus may have the communication unit to transmit thecontrol data to the outside or acquire state data from the outside bymeans of the communication unit.

The hub apparatus may have the memory unit to store data.

The control unit may perform the above-described apparatus management.The control unit may establish a communication channel with an externalapparatus by means of the communication unit, acquire control data fromthe external apparatus by means of the communication unit, and controlthe peripheral apparatus on the basis of the control data by means ofthe communication unit.

The control unit may provide a peripheral apparatus control tool to anexternal apparatus, The control unit may store peripheral apparatusdatabase including peripheral apparatus management data for identifyingand registering the peripheral apparatus by means of the memory unit.The control unit may acquire the peripheral apparatus control data fromthe external apparatus by means of the communication unit. The controlunit may determine a target peripheral apparatus to which the peripheralapparatus control data is to be transmitted by means of the database.The control unit may transmit the peripheral apparatus control data tothe target peripheral apparatus by means of the communication unit.

The peripheral apparatus management data may include peripheralapparatus identification information for identifying a peripheralapparatus connected to the hub apparatus and peripheral apparatusregistration information for registering the peripheral apparatus.

In this case, the peripheral apparatus control data may includeperipheral apparatus identification information for identifying at leastone peripheral apparatus and control command information for controllingthe identified peripheral apparatus as a target peripheral apparatus.The control command information may be transmitted from the hubapparatus to the target peripheral apparatus without format conversion.

According to an embodiment of the present disclosure, the hub apparatusmay optionally include a server unit. The server unit may have a webserver to provide a control tool to the external apparatus. Theproviding of a control tool to the external apparatus may be implementedby the external apparatus providing a web page, a web application, etc.to control the peripheral apparatus.

In this case, the control unit may provide a peripheral apparatuscontrol tool to the external apparatus by means of the server unit.

3.4.3.3 Operation of Peripheral Apparatus

The apparatus management method according to an embodiment of thepresent disclosure may be performed by a peripheral apparatus. Theperipheral apparatus may be a secondary printing apparatus. In theabove-described POS system, the peripheral apparatus may be a POSperipheral apparatus, such as a card reader, a barcode reader, etc. Theperipheral apparatus may be a secondary printing apparatus placed at asales office to which the POS system is applied.

According to an embodiment of the present disclosure, an apparatusmanagement method of the peripheral apparatus may include acquiringcontrol data from the external apparatus and transmitting a responsemessage to the external apparatus.

The control data may be operational control data for controllingoperation of the peripheral apparatus. The control data may be printdata for controlling a printing operation.

The response message may include state data. The state data may indicatea change in operational state of the peripheral apparatus due to thecontrol data.

According to an embodiment of the present disclosure, the peripheralapparatus may include a communication unit and a control unit.

The communication unit may communicate with an external apparatus.

The control unit may acquire control data from the external apparatus bymeans of the communication unit. The control unit may transmit statedata to the external apparatus by means of the communication unit.

3.4.3.4 Operation of Server Apparatus

The apparatus management method according to an embodiment of thepresent disclosure may be performed by a server apparatus.

According to an embodiment of the present disclosure, an apparatusmanagement method of the server apparatus may include acquiring acontrol tool request signal from a control apparatus and providing thecontrol tool to the control apparatus.

The server apparatus may have a communication unit to communicate withthe control apparatus.

The server apparatus may have a server unit to provide a control tool bywhich the control apparatus controls other apparatuses. The server unitproviding a control tool may be understood as the server unit providinga web server configured to provide a web application functioning as thecontrol tool.

The control tool may acquire a control command and transmit the controlcommand to an apparatus to which the control command is applied.

3.5 Embodiment of Communication Channel Management

According to an embodiment of the present disclosure, a websocketchannel established between a control apparatus and a printing apparatusmay be handled differently depending on processed data.

Specifically, when data processed by the websocket channel is print datarelevant to a printing operation, whether establishment of the websocketchannel is maintained may be determined by conditions associated withcommunication of the print data. When the data processed by thewebsocket channel is control data irrelevant to a printing operation, anestablishment duration time of the websocket channel may be determinedregardless of transmission and reception of the control data.

According to an embodiment of the present disclosure, a plurality ofwebsocket channels may be established between the control apparatus andthe printing apparatus. The plurality of websocket channels may includea first websocket channel and a second websocket channel. The firstwebsocket channel and the second websocket channel may be determined tohandle different types of data handled thereby.

According to an embodiment of the present disclosure, the firstwebsocket channel may be a communication channel for handling print dataso that the printing apparatus or a secondary printing apparatusconnected to the printing apparatus performs a printing operation. Thefirst websocket channel may be interrupted when a predeterminedcondition associated with the reception or transmission of the printdata is satisfied.

In this embodiment, the second websocket channel may be a communicationchannel for handling data for changing or indicating a state of theprinting apparatus or the secondary printing apparatus. For example, thesecond websocket channel may handle state data that changes an on/offstate, a network connection state, an operation state, or the like ofthe printing apparatus or the secondary printing apparatus. The secondwebsocket channel may indicate a change in the any of above-mentionedstates. The second websocket channel may be set to prevent datacommunication from being interrupted and perform continuous datacommunication. In some cases, an establishment duration time of thesecond websocket channel may be controlled on the basis of apredetermined condition. For example, a channel duration time may becontrolled when transmission or reception of the data handled throughthe second websocket channel is complete.

The duration time of the first websocket channel and the secondwebsocket channel may be both controlled on the basis of a predeterminedcondition. The condition on which the duration time of the firstwebsocket channel depending and the condition on which the duration timeof the second websocket channel depending may be implementeddifferently.

However, the data transmitted and received through the second websocketchannel is not limited to the above-described state data. It should beappreciated that all data except for the print data handled by the firstwebsocket channel may be handled by the second websocket channel.

According to another embodiment, the first websocket channel may beestablished to perform communication of data relevant to the printingapparatus. In this case, the second websocket channel may be establishedto perform communication of data relevant to a peripheral apparatus ofthe printing apparatus. Here, data relevant to a predetermined apparatusmay refer to data of which a final destination is the apparatus.

According to still another embodiment, a first websocket channel and asecond websocket channel may be established between the printingapparatus and the control apparatus, and the first websocket channel maybe used only for communication of print data. In other words, a channelthrough which print data is requested and a channel through which printdata is transmitted may be distinguished from each other. In this case,the print data may be requested through the second websocket channel andmay be transmitted through the first websocket channel in response tothe request through the second websocket channel. More specifically,when the control apparatus is requested by the printing apparatus toprovide print data through the second websocket channel, the firstwebsocket channel may be established. In this case, the controlapparatus may transmit the print data to the printing apparatus throughthe first websocket channel. Here, the first websocket channel may beestablished by the control apparatus or the printing apparatus. Thecontrol apparatus may determine whether there is print data to betransmitted to the printing apparatus and may initiate the establishmentof the first websocket channel when there is print data to betransmitted to the printing apparatus. Alternatively, when the printingapparatus requests the control apparatus to provide the print datathrough the second websocket channel, the control apparatus may initiatethe establishment of the first websocket channel in response to therequest for the print data. The printing apparatus may receive a messageindicating that the print data can be transmitted from the controlapparatus through the second websocket channel and initiate theestablishment of the first websocket channel in response to thereception.

When a channel through which print data is requested and a channelthrough which print data is transmitted are separately established asdescribed in the above embodiment, a websocket channel through whichprint data is transmitted may be established only when the print data isrequired to be transmitted. Thus, it is possible to prevent wasteresources due to unnecessary establishment of a communication channel.Also, the second websocket channel may be maintained regardless oftransmission of print data so that the control apparatus may quicklyrespond to a request for the print data through the second websocketchannel.

A websocket channel management method of a printing apparatus accordingto an embodiment of the present disclosure may include establishing afirst websocket channel and a second websocket channel for communicatingwith an external apparatus, acquiring print data for controlling aprinting operation of the printing apparatus from the external apparatusthrough the first websocket channel, acquiring control data forcontrolling a state of the printing apparatus from the externalapparatus through the second websocket channel, and restricting achannel duration time of the first websocket channel.

The control data may include peripheral apparatus registrationinformation so that the printing apparatus may control a peripheralapparatus connected to the printing apparatus.

The restricting of the channel duration time of the first websocketchannel may include determining a closing time of the first websocketchannel. The restricting of the channel duration time of the firstwebsocket channel may include interrupting the first websocket channelwithin a predetermined time period after the print data is acquired.

FIG. 15 shows a flowchart illustrating a websocket channel managementmethod in detail according to an embodiment of the present disclosure.Referring to FIG. 15, the websocket channel management method of theprinting apparatus according to an embodiment of the present disclosuremay include establishing a first websocket channel for communicatingwith an external apparatus (S1010), establishing a second websocketchannel for communicating with the external apparatus (S1020), acquiringprint data from the external apparatus through the first websocketchannel (S1030), acquiring control data from the external apparatusthrough the second websocket channel (S1040), transmitting a request forclosing the first websocket channel to the external apparatus (S1050),and closing the first websocket channel (S1060). The external apparatusmay be the external control apparatus described herein.

4. Second Process: Online Order Printing

4.1 Performing Printing Operation According to Second Process

As another example of the printing process disclosed herein, a system,method, and apparatus for performing a printing operation using theabove-described communication channel will be described below.Specifically, a system, method, and apparatus for acquiring dataallocated to an apparatus using the websocket communication channel willbe described below.

A printing method according to the second process may be implemented bya server for storing print data to be printed. The server may collectprint data from a plurality of printing consumer and appropriatelyallocate and transfer the collected print data to a plurality ofprinting suppliers. Such a server serving as a stopping point of theprint data is hereinafter referred to as a data distribution server.Data transferred from the printing consumer to the printing supplier bythe data distribution server is not limited to the above-described printdata and may be handled similarly to any data relevant to a printingoperation.

The data distribution server may be a cloud server. In this case, theprinting method according to the second process may be a cloud printingmethod. Here, the cloud server, which is designed by cloud computing,may refer to a type of server implemented to control applications orstore files through a web browser or the like.

4.1.1 System

4.1.1.1 Third System

The printing method according to the present disclosure may beimplemented by a third system including a user terminal, a datadistribution server, and a printing apparatus. The third system may beunderstood as a POS system for processing data used for a product orservice sale. In particular, the third system may be applied as anonline order system when a physical area where a product or service isbeing sold is far away from a position where the product or the like isordered and a consumer is purchasing the product or the like online. Inthis case, a POS system in which an online order is relayed by a datadistribution server is hereinafter referred to as a cloud POS system.

FIG. 16 briefly shows a third system according to an embodiment of thepresent disclosure. Referring to FIG. 16, the third system may include auser terminal 400, a data distribution server 500, and a printingapparatus 600.

The user terminal 400 may receive information from a user. The userterminal 400 may generate data on the basis of the information receivedfrom the user.

The user terminal 400 may generate the data. The data may be print data.The data may include a control command written in a command format forcontrolling the printing apparatus 600. The data may include destinationinformation understandable by the data distribution server 500. The datamay include online order details. For example, the data may includeidentification information of a business provider that receives anorder, identification information of a product or service ordered, etc.The data may include any one of the product or ordered service name, thebusiness provider name, the store name in which the product or theservice is provided and the store location.

The user terminal 400 may communicate with an external apparatus. Theuser terminal 400 may communicate with the data distribution server 500to transmit data to the data distribution server 500.

In the above-described POS system, the user terminal 400 may be a userterminal 400 of a customer who wants to order a product or the likeonline.

The data distribution server 500 may communicate with an externalapparatus. The data distribution server 500 may acquire data from theexternal apparatus or transmit data to the external apparatus. The datadistribution server 500 may transmit data to the user terminal 400 orthe printing apparatus 600.

The data distribution server 500 may establish a communication channelwith the external apparatus. The data distribution server 500 mayestablish a communication channel with the printing apparatus 600. Thedata distribution server 500 may establish a communication channel witha plurality of external apparatuses.

The data distribution server 500 may store data acquired from theoutside. The data distribution server 500 may store data acquired fromthe user terminal 400 or the printing apparatus 600. The datadistribution server 500 may acquire data from a plurality of userterminals 400 or the printing apparatus 600 and store the acquired data.

The data distribution server 500 may distribute the data. The datadistribution server 500 may determine an external apparatus to which theacquired data is to be transmitted and may transmit the data to thedetermined external apparatus. The data distribution server 500 mayestablish a communication channel with the plurality of externalapparatuses and may transmit the acquired data to some of the pluralityof external apparatuses.

In some cases, the data distribution server 500 may process the data.The data distribution server 500 may relay the data to the externalapparatus without processing the data. The data distribution server 500may perform format conversion on the acquired data or modify or combinethe acquired data.

In the above-described online order system, the data distribution server500 may be understood as a cloud server configured to acquire data suchas an order list from the user terminal of the customer and transfer theacquired data to each shop. In the above-described online order system,the data distribution server 500 may acquire data from the plurality ofuser terminals 400 and may be connected with a plurality of printingapparatuses 600 to distribute the acquired data.

The printing apparatus 600 may establish a communication channel with anexternal apparatus. The printing apparatus 600 may establish acommunication channel with the data distribution server 500.

The printing apparatus 600 may request data from the external apparatus.The printing apparatus 600 may request print data from the datadistribution server 500.

The printing apparatus 600 may acquire data from the external apparatusor transmit data to the external apparatus. The printing apparatus 600may acquire data from the data distribution server 500 or transmit datato the data distribution server 500.

The printing apparatus 600 may perform a printing operation. Theprinting apparatus 600 may perform a printing operation on the basis ofthe data acquired from the external apparatus. The printing apparatus600 may be handled similarly to the printing apparatus described in thefirst process, unless specially stated otherwise.

FIG. 17 briefly shows a third system according to another embodiment ofthe present disclosure. Referring to FIG. 17, the third system mayinclude a plurality of user terminals 400, a data distribution server500, and a plurality of printing apparatuses 600.

The third system may include a plurality of user terminals. Theplurality of user terminals 400 may include a first user terminal 401, asecond user terminal 402, and a third user terminal 403.

The first user terminal 401 and the second user terminal 402 maycommunicate with the data distribution server 500. The first userterminal 401 and the second user terminal 402 may transmit data to thedata distribution server 500.

The data distribution server 500 may store data acquired from the firstuser terminal 401 and the second user terminal 402. The datadistribution server 500 may store data acquired from the first userterminal 401 together with identification information of the first userterminal 401. The data distribution server 500 may store data acquiredfrom the second user terminal 402 together with identificationinformation of the second user terminal 402.

The plurality of printing apparatuses 600 may include a first printingapparatus 601, a second printing apparatus 602, and a third printingapparatus 603.

The first printing apparatus 601 and the second printing apparatus 602may communicate with the data distribution server 500. The firstprinting apparatus 601 and the second printing apparatus 602 mayestablish a websocket communication channel with the data distributionserver 500. The data distribution server 500 may distribute the dataacquired from the plurality of user terminals 400 to the plurality ofprinting apparatuses 600. The data distribution server 500 may transmitdata allocated to the first printing apparatus 601 to the first printingapparatus 601. The data distribution server 500 may transmit dataallocated to the second printing apparatus 602 to the second printingapparatus 602.

4.1.1.2 Fourth System

The third system has been described above as including a user terminal,a data distribution server, and a printing apparatus, but may furtherinclude a peripheral apparatus, for example, a secondary printingapparatus, which is connected to the printing apparatus. Hereinafter,the third system further including the peripheral apparatus will bereferred to as a fourth system. A printing method implemented by thefourth system is a little different from the printing method implementedby the third system, but rather can be easily inferred from thedescription of the first printing process by those skilled in the art.

4.1.2 System Operation

Here, a method of the above-described third system and fourth systemperforming a printing operation according to a second printing processwill be described. However, the printing operation according to thesecond printing process may be implemented not only by the third systemand the fourth system, but may be applied to a system to which anotherapparatus is added or from which some apparatuses are removed.

4.1.2.1 Operation of Third System

The second printing process described herein may be performed by theabove-described third system. The second printing process of the thirdsystem may include transmitting, by a user terminal, data to a datadistribution server, determining, by the data distribution server, aprinting apparatus to which the data is to be transmitted, andtransferring, by the data distribution server, the data to thedetermined printing apparatus.

The user terminal may transmit data to a data distribution server over anetwork such as a public Internet network, a private network, a widearea Internet network, or the like. The user terminal transmitting datato a data distribution server may denote that the user terminaltransmits print data for printing online order details.

The data distribution server determining a printing apparatus to whichthe data is to be transmitted may denote that the data distributionserver acquires reference information included in the data and performsthe determination in consideration of the reference information. Forexample, the reference information may be identification information ofa printing apparatus to which the data is to be acquired.

The data distribution server may transmit the data to the determinedprinting apparatus. The data server may establish a websocket channelwith the printing apparatus and may transmit the data to the printingapparatus through the websocket channel.

4.1.2.2 Operation of Fourth System

The second printing process described herein may be performed by theabove-described fourth system. The second printing process of the fourthsystem may include transmitting, by a user terminal, data to a datadistribution server, identifying, by the data distribution server, thedata, transferring, by the data distribution server, the data to aprinting apparatus, and transferring, by the printing apparatus, thedata to a peripheral apparatus or a secondary printing apparatus.

The second printing process of the fourth system may be carried outalmost similarly to the above described printing process of the thirdsystem. An example of differences between the second printing process ofthe fourth system and the printing process of the third system will bedescribed below.

For the second printing process of the fourth system, the datadistribution server may consider the peripheral apparatus when the datadistribution server determines a destination to which the data is to betransmitted. Also, the data transmitted to the printing apparatus may beultimately transmitted to the peripheral apparatus.

4.1.3 Operation of Each Apparatus

Here, the apparatuses constituting the above-described third system andfourth system and operation performed by the apparatuses will bedescribed. However, the printing method or the like of the presentdisclosure is performed not only by the apparatuses, which will bedescribed below, but each of the apparatuses may be replaced with otherelectronic apparatuses for performing a function thereof, similarfunctions, or a combination thereof.

4.1.3.1 Operation of User Terminal

According to the present disclosure, a user terminal may acquire anorder list from a user and transmit order information acquired from theorder list to a server. In other words, the user terminal may beunderstood as acquiring an online order list from the user andtransmitting the acquired online order list to an intermediate serverconfigured to collect data.

According to an embodiment of the present disclosure, the data may beprocessed by the user terminal. The user terminal processing the datamay include receiving information from the user, generating data on thebasis of the information, and transmitting the data to an externalapparatus.

The user terminal may acquire user input information from the user. Theuser terminal may acquire identification information of a printingapparatus to be controlled from the user. The user terminal may acquireorder information such as an ordered item, a payment method, and ashipping address from the user. The user terminal may acquire controlinformation for controlling the printing apparatus, which will bedescribed below, from the user.

The user terminal may generate data. The user terminal may generate dataon the basis of the acquired user input information.

The user terminal may generate print data in consideration of orderinformation received from the user. The user terminal may generate printdata in a format interpretable by a printing apparatus, which will bedescribed below. The user terminal may generate control data forcontrolling the printing apparatus in a command format of the printingapparatus on the basis of control information for controlling theprinting apparatus.

The user terminal may transmit the data to an external apparatus. Theuser terminal may transmit the print data or the control data to theexternal apparatus.

FIG. 18 briefly shows a user terminal according to an embodiment of thepresent disclosure. Referring to FIG. 18, the user terminal may includea communication unit 410, a user input unit 430, a memory unit 450, anda control unit 470. The user terminal may be an electronic apparatus inwhich a web browser or the like is excuted. The user terminal may be amobile terminal such as a smartphone, a tablet PC, a laptop, a desktop,a netbook, or the like. The user terminal may be implemented similarlyto the above-described external control apparatus.

The communication unit 410 may communicate with an external apparatus.The communication unit 410 may communicate with the data distributionserver to acquire data from the server or transmit data to the server.The communication unit 410 may transmit order information to the datadistribution sever. The communication unit 410 may acquire order resultinformation from the data distribution server.

The user input unit 430 may acquire a user input. The user input unit430 may receive order details from a user. The user input unit 430 mayacquire user input information from the user.

The control unit 470 may perform the above-described data processing bymeans of the communication unit 410 and the user input unit 430. Thecontrol unit 470 may acquire the user input information from the user,generate the data, and transmit the data to the external apparatus.

4.1.3.2 Operation of Data Distribution Server

According to the present disclosure, a data distribution server maytransfer data acquired from a user to an appropriate printing apparatus.Specifically, the data distribution server may be understood asacquiring online order information and relaying the acquired onlineorder information to a POS printer located at an appropriate sales storeso that the order information can be printed by the POS printer.However, according to the present disclosure, the handled data is notlimited to data relevant to a printing operation, and thus data forchanging settings of an apparatus or controlling operations except forprinting may also be handled in a similar manner.

The data management according to an embodiment of the present disclosuremay be performed by a server apparatus (i.e., the data distributionserver). The data management performed by the data distribution servermay include acquiring data from an external apparatus, determining atarget apparatus to which the acquired data is to be transmitted, andtransmitting the data to the target apparatus.

The data distribution server acquiring data from an external apparatusmay denote that the data distribution server acquires data from a userterminal. The data distribution server may acquire data from a pluralityof user terminals.

The data distribution server determining a target apparatus to which theacquired data is to be transmitted may denote that the data distributionserver performs the determination in consideration of referenceinformation included in the data. For example, the reference informationmay be any one of location information, a data format, a data type, andidentification information of the target apparatus. As another example,the reference information may be destination information of the data,condition information of an apparatus controllable by the data, a typeof the data, a format of the data, location information of an apparatusto which the data is transmitted, or the like. The location informationmay be acquired by means of global positioning system (GPS) module.

For example, the data may include location information. The datadistribution server may transmit the data to a target apparatus matchedto a corresponding location on the basis of the location information. Asa detailed example, the data may include location information of theexternal apparatus to which the data is transmitted. The datadistribution server may determine an apparatus having matching locationinformation as the target apparatus in consideration of the locationinformation of the external apparatus and may transmit the data to thetarget apparatus.

The data may have a format interpretable by the printing apparatus. Thedata may have a format usable by the printing apparatus without formatconversion.

The data distribution server determining a target apparatus to which thedata is to be transmitted may denote that the data distribution serverdetermines the target apparatus from among a plurality of candidateapparatuses connected to the data distribution server. The datadistribution server may determine the target apparatus using a databaseprovided in advance. The database may store at least one ofidentification information, characteristic information, and locationinformation of the plurality of candidate apparatuses.

The data distribution server may determine the target apparatus to whichthe data is to be transmitted in consideration of reference informationacquired from the data and with reference to a database in whichinformation of the candidate apparatuses are stored.

When the data distribution server determines the target apparatus towhich the data is to be transmitted, the correspondence relationship ofthe data and the target apparatus may be flexible.

When first data and second data are acquired, the data distributionserver may transmit the first data to a first target apparatus andtransmit the second data to a second target apparatus, thus achieving astable matching between the pieces of data and the apparatuses.Alternatively, the data distribution server may determine that the firstdata corresponds to both of the first target apparatus and the secondtarget apparatus and transmit the data to an apparatus requesting thedata first, which is one of the first target apparatus and the secondtarget apparatus.

The data distribution server transmitting the data to the targetapparatus may denote that the data distribution server establishes awebsocket communication channel with the target apparatus and transmitsthe data through the websocket communication channel. When the websocketcommunication channel is established between the data distributionserver and the target apparatus, the data distribution server maytransmit the data to the target apparatus within a predetermined timeperiod after the communication channel is established.

The data distribution server transmitting the data to the targetapparatus may denote that the data distribution server transmits thedata in response to a request originating from the target apparatus.When data matched to the target apparatus is requested by the targetapparatus, the data distribution server may transmit the data matched tothe target apparatus to the target apparatus.

A data management method according to an embodiment of the presentdisclosure may include acquiring first print data and second print data,establishing a first websocket channel with a first apparatus andtransmitting first print data matched to the first apparatus to thefirst apparatus through the first websocket channel when print data isrequested by the first apparatus through the first websocket channel,and establishing a second websocket channel with a second apparatus andtransmitting second print data matched to the second apparatus to thesecond apparatus through the second websocket channel when print data isrequested by the second apparatus through the second websocket channel.Here, each of the first apparatus and the second apparatus may beimplemented as a printing apparatus, which will be described below indetail with reference to FIG. 19.

FIG. 19 is a flowchart illustrating a data management method accordingto an embodiment of the present disclosure. Referring to FIG. 19, thedata management method of the server apparatus may include acquiringfirst print data and second print data (S3100), transmitting the firstprint data to a first printing apparatus (S3200), and transmitting thesecond print data to a second printing apparatus (S3300).

The first print data and the second print data may include differentidentification information.

The server apparatus transmitting the first print data to a firstprinting apparatus (S3200) may denote that the server apparatusestablishes a first websocket channel with the first printing apparatusand transmits first print data matched to the first printing apparatusto the first printing apparatus through the first websocket channel whenprint data is requested by the first printing apparatus through thefirst websocket channel.

The server apparatus transmitting the second print data to a secondprinting apparatus (S3300) may denote that the server apparatusestablishes a second websocket channel with the second printingapparatus and transmits second print data matched to the second printingapparatus to the second printing apparatus through the second websocketchannel when print data is requested by the second printing apparatusthrough the second websocket channel.

In this case, the first print data may correspond to apparatusinformation of the first printing apparatus, and the second print datamay correspond to apparatus information of the second printingapparatus. The first printing apparatus may satisfy a control conditionof the first print data, and the second printing apparatus may satisfy acontrol condition of the second print data. A control condition of adata may refer to a condition need to be satisfied to be controlled bythe data.

When the first print data is acquired at a first acquisition time point,the second print data is acquired at a second acquisition time pointlater than the first acquisition time point, and the second websocketchannel is established earlier than the first websocket channel, thesecond print data may be transmitted to the second printing apparatusbefore the first print data is transmitted to the first printingapparatus.

When the first print data is acquired at a first acquisition time point,the second print data is acquired at a second acquisition time pointlater than the first acquisition time point, and requesting for printdata through the second websocket channel is performed earlier thanrequesting for print data through the first websocket channel, thesecond print data may be transmitted to the second printing apparatusbefore the first print data is transmitted to the first printingapparatus.

The first print data may be repeatedly requested by the first printingapparatus according to a first request interval, and the second printdata may be repeatedly requested by the second printing apparatusaccording to a second request interval.

When the first printing apparatus satisfies a control condition of thefirst print data, the first printing apparatus may operate on the basisof the first print data, and also a first control command included inthe first print data may be understood by the first printing apparatuswithout format conversion. In other words, the first apparatus satisfiesa control condition may denote that the first apparatus performoperation on the basis of the first print data and the first controlcommand included in the first print data may be understood by the firstprinting apparatus without format conversion.

The apparatus information of the printing apparatus may include uniqueidentification information of the printing apparatus, and print datacorresponding to the printing apparatus may include uniqueidentification information of the printing apparatus.

The apparatus information of the first printing apparatus may includeapparatus information of a peripheral apparatus connected to the firstprinting apparatus, and the first print data may match a peripheralapparatus connected to the first printing apparatus.

The first print data may match a peripheral apparatus connected to thefirst printing apparatus. When print data is requested by the peripheralapparatus connected to the first printing apparatus through thewebsocket channel, the first print data may be transmitted to the firstprinting apparatus through the first websocket channel. The peripheralapparatus connected to the first printing apparatus may satisfy thecontrol condition of the first print data. The first print data maycorrespond to the apparatus information of the peripheral apparatusconnected to the first printing apparatus.

The first print data may correspond to both of the apparatus informationof the first printing apparatus and the apparatus information of thesecond printing apparatus. The first websocket channel may beinterrupted when a first duration time has elapsed after the firstwebsocket channel is established. The second websocket channel may beinterrupted when a second duration time shorter than the first durationtime has elapsed after the second websocket channel is established. Inthis case, when the first websocket channel remains established and thesecond websocket channel is interrupted, the first print data may betransmitted to the first printing apparatus through the first websocketchannel.

A data management method according to an embodiment of the presentdisclosure may include establishing a websocket channel with a serverconfigured to store print data, periodically requesting print data fromthe server through the websocket channel, and acquiring print datamatched to an apparatus from the server through the websocket channel.Here, the apparatus may be implemented as a printing apparatus, whichwill be described below in detail with reference to FIG. 20.

FIG. 20 is a flowchart illustrating a data management method accordingto an embodiment of the present disclosure. Referring to FIG. 20, thedata management method of the server apparatus, which has been describedabove with reference to FIG. 19, may further include acquiring thirdprint data corresponding to the apparatus information of the firstprinting apparatus (S3400) after the acquiring of the first print dataand the second print data and before the transmitting of the first printdata to the first printing apparatus through the first websocketchannel.

The transmitting of the first print data to a first printing apparatus(S3200) may include transmitting both of the first print data and thethird print data to the first printing apparatus when the print data isrequested through the first websocket channel (S3200 a). The firstprinting apparatus may further satisfy a control condition of the thirdprint data. When the third print data is acquired before the first printdata is transmitted, the first print data and the second print data maybe transmitted together to the first printing apparatus.

In this case, the transmitting of both of the first print data and thethird print data to the first printing apparatus may denote that theserver apparatus enables the first print data to have priority over thethird print data so that a printing operation for the first print datais earlier performed than a printing operation for the third print data.

FIG. 21 briefly shows a data distribution server 500 according to anembodiment of the present disclosure. Referring to FIG. 21, the datadistribution server 500 according to an embodiment of the presentdisclosure may include a communication unit 510, a memory unit 530, anda control unit 550. The data distribution server 500 may be implementedas a cloud server configured to store a large amount of data andtransfer the data to an appropriate position. In the above-describedcloud POS system, the data distribution server 500 may be implemented asa cloud server configured to connect a customer with a sales system.

The data distribution server 500 may have the communication unit 510 tocommunicate with an external apparatus. The data distribution server 500may acquire data and transfer the data to a target apparatus by means ofthe communication unit 510.

The data distribution server 500 may have the memory unit 530 to storedata acquired from the external apparatus. The memory unit 530 may havea database DB1 for managing the external apparatus. The database DB1 maystore identification information of an external apparatus, networkconnection information of an external apparatus, control environmentinformation of an external apparatus, etc.

The data distribution server 500 may have the control unit 550 toperform the above-described data management by means of thecommunication unit 510 and the memory unit 530. The control unit 550 mayacquire data from an external apparatus by means of the communicationunit 510, determine a target apparatus to which the data is to betransmitted, and transmit the data to the target apparatus by means ofthe communication unit 510.

The control unit 550 may acquire first print data and second print databy means of the communication unit 510. The control unit 550 mayestablish a websocket channel between a first printing apparatus and asecond printing apparatus by means of the communication unit 510. Thecontrol unit 550 may transmit the first print data, which matches thefirst printing apparatus, to the first printing apparatus through thewebsocket channel by means of the communication unit 510 when print datais requested by the first printing apparatus. The control unit 550 maytransmit the second print data, which matches the second printingapparatus, to the second printing apparatus through the websocketchannel by means of the communication unit 510 when print data isrequested by the second printing apparatus.

The printing apparatus illustrated in the above embodiments maycorrespond to a hub apparatus configured to manage print data and anykind of data processing apparatus other than an apparatus configured toperform a printing operation.

4.1.3.3 Operation of Printing Apparatus

According to the present disclosure, a printing apparatus may perform aprinting operation on the basis of data allocated thereto by a server.In the above-described cloud POS system, the printing apparatus may be aPOS printer located in a sales store. In the cloud POS system, theprinting apparatus may serve to transfer an online order list to thesales office.

A printing method according to an embodiment of the present disclosuremay be performed by the printing apparatus. The printing method of theprinting apparatus may include requesting data to an external apparatus,acquiring the data from the external apparatus, and performing aprinting operation on the basis of the acquired data.

The printing apparatus requesting data from the external apparatus maydenote that the printing apparatus requests data allocated to theprinting apparatus from the external apparatus. The requesting of datamay be performed through a websocket channel. The requesting of dataallocated to the printing apparatus, performed by the printingapparatus, may comprise providing apparatus information of the printingapparatus and requesting data corresponding to the apparatusinformation. The apparatus information may include a location, afunction, a state, identification information, or the like of theprinting apparatus.

The printing apparatus may request the data repeatedly or periodically.An interval at which the printing apparatus requests data from theexternal apparatus may be changed. For example, the printing apparatusmay request data according to a first interval during a first period andmay request data according to a second interval during a second period.In this case, it is possible to prevent waste of resources due tofrequent data requests by setting the second interval to be longer thanthe first interval. The printing apparatus may shorten the data requestinterval when the data is acquired. That is, the printing apparatus maychange the data request interval in consideration of whether the data isacquired.

The printing apparatus requesting the data may denote that the printingapparatus establishes a communication channel with the externalapparatus and requests the data. The printing apparatus may establishthe communication channel with the external apparatus, request the data,and interrupt the communication channel when no data is acquired. Theabove-described data request interval may be a period of time for whichthe communication channel is established, interrupted, and thenre-established when the communication channel is repeatedly establishedand interrupted.

A time of period for which the communication channel is established andthen interrupted may be referred to as a duration time of thecommunication channel. The duration time of the communication channelmay be remained constantly. The duration time of the communicationchannel may be changed. In this case, the duration time of thecommunication channel may change depending on a data communicationenvironment such as the above-described data request interval.

The printing apparatus receiving the data from the external apparatusmay denote that the printing apparatus requests data from the externalapparatus and receives the data in response to a request for the data.The printing apparatus may acquire the data from the external apparatusthrough a websocket communication channel.

The printing apparatus acquiring the data from the external apparatusmay denote that the printing apparatus acquires print data transmittedto the printing apparatus.

The printing apparatus performing a printing operation on the basis ofthe received data may denote that the printing apparatus performs aprinting operation on the basis of print data transmitted to theprinting apparatus, targeting the printing apparatus, by the externalapparatus. The printing apparatus performing a printing operation on thebasis of the received data may denote that the printing apparatusperforms a printing operation according to a control command for theprinting apparatus included in the received data without formatconversion of the control command.

A data management method of the printing apparatus according to anembodiment of the present disclosure may include establishing awebsocket channel with a server configured to store print data,periodically requesting print data from the server through the websocketchannel, and acquiring print data matched to the printing apparatus fromthe server through the websocket channel in response to the request.

Here, the print data matched to the printing apparatus may correspond toapparatus information of the printing apparatus, and the printingapparatus may satisfy a control condition of the print data.

The requesting of print data may denote that the printing apparatusrequests print data for controlling a peripheral apparatus connected tothe print apparatus from the server in response to the peripheralapparatus requesting print data. The print data may correspond toapparatus information of the peripheral printing apparatus, and theperipheral printing apparatus may satisfy the control condition of theprint data.

When the printing apparatus is a hub printing apparatus, a datamanagement method of the hub printing apparatus may include receiving arequest for data from a peripheral apparatus connected to the hubprinting apparatus, requesting data from an external apparatus,requesting data allocated to the peripheral apparatus from the externalapparatus, and acquiring the data allocated to the peripheral apparatusfrom the external apparatus.

The requesting of data allocated to the peripheral apparatus from theexternal apparatus may denote that the hub printing apparatus providesapparatus information of the peripheral apparatus and requests datacorresponding to the apparatus information.

The data management method of the hub printing apparatus may includetransferring the acquired data to the peripheral apparatus. Thetransferring of the acquired data to the peripheral apparatus may beperformed with reference to destination information of the acquireddata.

According to an embodiment of the present disclosure, there may beprovided a data management apparatus including a communication unit, aprinting unit, and a control unit configured to establish a websocketchannel with a server configured to store print data by means of thecommunication unit, periodically request print data from the serverthrough the websocket channel by means of the communication unit, andacquire print data corresponding to the apparatus from the serverthrough the websocket channel by means of the communication unit inresponse to the request. According to an embodiment of the presentdisclosure, the data management apparatus, which is a print datamanagement apparatus, may be implemented as a printing apparatus. Thiswill be described below in detail with reference to FIG. 22.

FIG. 22 shows a printing apparatus 600 according to an embodiment of thepresent disclosure. Referring to FIG. 22, the printing apparatus 600according to an embodiment of the present disclosure may include acommunication unit 610, a printing unit 630, a memory unit 650, and acontrol unit 670.

The printing apparatus 600 may have the communication unit 610 toacquire data from an external apparatus or transmit data to the externalapparatus. The communication unit 610 may acquire print data from theexternal apparatus.

The printing apparatus 600 may have the printing unit 630 to perform aprinting operation. The printing unit 630 may perform the printingoperation on the basis of the print data.

The memory unit 650 may store print data acquired from an externalapparatus. The memory unit 650 may store connection information of anexternal apparatus, connection information of a peripheral apparatusconnected to the printing apparatus 600, etc.

The printing apparatus 600 may have the control unit 670 to perform theabove-described printing operation. The control unit 670 may acquirecontrol data from an external apparatus by means of the communicationunit 610 and may perform the printing operation on the basis of thecontrol data by means of the printing unit 630.

The control unit 670 may establish a websocket channel with a serverconfigured to store print data by means of the communication unit 610,periodically request print data from the server through the websocketchannel by means of the communication unit 610, and acquire print datacorresponding to the printing apparatus from the server through thewebsocket channel by means of the communication unit 610 in response tothe request.

4.2 Establishment of Connection Channel

When a printing operation is performed according to the second process,there is an issue with respect to a process of establishing connectionbetween the data distribution server and the printing apparatus. Whenthe printing operation is performed according to the second process, auser is usually placed far from the data distribution server, and thus ageneral user other than a professional technician may have difficulty inestablishing a connection channel between the printing apparatus and thedata distribution server. A solution allowing a user to experience moreconvenient apparatus optimization will be described below.

4.2.1 Connection Process

When a data communication channel is intended to be established betweena first apparatus and a second apparatus, the first apparatus mayrequest that the second apparatus establishes a communication channelfirst. In this case, in order for the first apparatus to request thesecond apparatus to establish a channel, connection information of thesecond apparatus may be required. A channel manager may be used toprovide the connection information of the second apparatus to the firstapparatus.

The channel manager may acquire identification information of the firstapparatus from the first apparatus. The channel manager may determine asecond apparatus matched to the first apparatus using identificationinformation of the first apparatus. The channel manager may transmitconnection information of the second apparatus matched to the firstapparatus to the first apparatus.

The first apparatus may be a printing apparatus, and the secondapparatus may be a data distribution server. Alternatively, the firstapparatus may be a data distribution server, and the first apparatus maybe a printing apparatus.

4.2.2 System Operation

Here, a data management method for establishing a websocket channelbetween a printing apparatus and a data distribution server in order toperform a printing operation according to the second printing process ofthe present disclosure will be described.

According to an embodiment of the present disclosure, the datamanagement for establishing the websocket channel may be performed by acommunication channel management application configured to mediatebetween the data distribution server and the printing apparatus. Thecommunication channel management application may be broadly understoodas a concept that encompasses a web application, a program, a web page,a user interface, etc. for performing a communication channel managementfunction, which will be described below as well as an applicationrunning on an operating system.

In order to establish the websocket channel between the printingapparatus and the data distribution server, the printing apparatus andthe data distribution server may be required to recognize each other. Tothis end, information of the printing apparatus may be transmitted tothe data distribution server, or information of the data distributionserver may be transmitted to the printing apparatus. Embodiments inwhich the information of the printing apparatus may be transmitted tothe data distribution server and in which the information of the datadistribution server may be transmitted to the printing apparatus, inorder to establish a communication channel between the printingapparatus and the data distribution server will be described below.

A data management method according to the present disclosure may includeacquiring unique identification information of the printing apparatus,acquiring connection information of a data distribution server matchedto the printing apparatus, and transmitting connection information ofthe data distribution server to the printing apparatus.

The acquiring of unique identification information of the printingapparatus may include acquiring shop identification information of ashop at which the printing apparatus is placed. For example, the shopidentification information may include a name, an address, locationinformation, a network IP address, or the like of the shop.

The unique identification information of the printing apparatus mayinclude a unique serial number or the like assigned to the printingapparatus. When the printing apparatus is a hub printing apparatus, theunique identification information may be unique identificationinformation assigned to a peripheral apparatus.

The acquiring of unique identification information of the printingapparatus may denote acquiring the unique identification information byperforming wireless communication with the printing apparatus. Theacquiring of unique identification information of the printing apparatusmay denote acquiring the unique identification information by performingcommunication, such as Near Field Communication (NFC), WiFicommunication, Radio-frequency identification (RFID) communication, andBluetooth communication, with the printing apparatus. The acquiring ofunique identification information of the printing apparatus may denoteacquiring the unique identification information by performingcommunication after recognizing the printing apparatus and automaticallyestablishing a communication connection with the printing device.

The acquiring of unique identification information of the printingapparatus may be performed by recognizing an identifier placed at theprinting apparatus. For example, the acquiring of unique identificationinformation of the printing apparatus may be performed by recognizing amark image, such as a barcode and a QR code, attached to the printingapparatus.

The acquiring of connection information of a data distribution servermatched to the printing apparatus may be performed using a databaseprovided in advance. The database may be a database prestored in thedata distribution server and configured to match connection informationof a plurality of data distribution servers to characteristicinformation of the plurality of data distribution servers and store thematched connection information. The acquiring of connection informationof a data distribution server using the database may denote determininga data distribution server corresponding to identification informationof the printing apparatus from the database and acquiring connectioninformation of the determined data distribution server.

The acquiring of connection information of a data distribution servermatched to the printing apparatus may be performed by a separate managerapplication. The manager application may store connection information ofat least one data distribution server and provide the stored connectioninformation to the channel management apparatus if necessary. Themanager application includes a program, a source code, or the likeexecuted by a manager terminal.

The connection information of the data distribution server may beunderstood as information required to establish a websocket channel withthe data distribution server. The connection information of the datadistribution server may be information required to transmit a handshakemessage for establishing a websocket channel to the data distributionserver. For example, the connection information of the data distributionserver may be an IP address, a domain name, etc. of the datadistribution server.

The transmitting of connection information of the data distributionserver to the printing apparatus may denote transmitting the connectioninformation over a local network, a wide area Internet network, or thelike.

The data management method according to this embodiment may furtherinclude establishing, by the printing apparatus, a websocket channelwith the data distribution server.

The data management method may further include transmitting, by theprinting apparatus, a response message to the channel managementapplication. The response message may have a purpose of indicating thatthe printing apparatus has acquired the connection information of thedata distribution server. The response message may have a purpose ofindicating that the printing apparatus establishes a websocket channelwith the data distribution server.

In the data management method according to the present disclosure, asdescribed above, the printing apparatus may send a communication channelsignal to the data distribution server by transferring the informationof the data distribution server to the printing apparatus.Alternatively, the data server may establish a communication channel bytransferring the information of the printing apparatus to the datadistribution server. An example in which the data distribution serveracquires connection information of the printing apparatus andestablishes a communication channel will be described below.

Another data management method according to the present disclosure mayinclude acquiring connection information of a data distributionapparatus, acquiring unique identification information of a printingapparatus matched to the data distribution apparatus, and transmittingthe unique identification information of the printing apparatus to thedata distribution apparatus.

The acquiring of connection information of a data distribution apparatusmay denote acquiring the connection information using a databaseprovided in advance. The acquiring of connection information of a datadistribution apparatus may denote acquiring the connection informationfrom a manager terminal configured to manage a plurality of datadistribution apparatuses or an application running on the managerterminal.

The acquiring of unique identification information of the printingapparatus may denote acquiring the unique identification informationthrough the above-described communication channel managementapplication. The acquiring of unique identification information of aprinting apparatus may denote determining a printing apparatuscorresponding to the data distribution apparatus using the database andtransmitting unique identification information of the determinedprinting apparatus.

The transmitting of the unique identification information of theprinting apparatus to the data distribution apparatus includes the datadistribution apparatus transmitting network connection informationrequired to establish a websocket communication channel with theprinting apparatus.

FIG. 23 shows a channel establishment system according to an embodimentof the present disclosure. The establishment of a communication channelaccording to an embodiment of the present disclosure may be performed bythe channel establishment system shown in FIG. 23. Referring to FIG. 23,the channel establishment system according to an embodiment of thepresent disclosure may include a printing apparatus 600, a datadistribution server 500, and an electronic apparatus 800.

The electronic apparatus 800 may be an apparatus on which theabove-described communication channel management application is running.The electronic apparatus 800 may be an electronic apparatus controlledto perform a communication channel management function.

The electronic apparatus 800 may be connected to the printing apparatus600 and the data distribution server 500 to mediate the establishment ofa communication channel between the printing apparatus 600 and the datadistribution server 500. The electronic apparatus 800 may assist inestablishing a websocket communication channel between the printingapparatus 600 and the data distribution server 500.

4.2.3 Operation of Each Apparatus

4.2.3.1 Communication Channel Manager

A data management method according to the present disclosure, which isperformed by the above-described communication channel manager, mayinclude acquiring unique identification information of a printingapparatus, acquiring connection information of a data distributionserver matched to the printing apparatus, and transmitting connectioninformation of the data distribution server to the printing apparatus.

Another data management method of the above-described communicationchannel manager according to the present disclosure may includeacquiring unique identification information of a data distributionserver, acquiring connection information of a printing apparatus matchedto the data distribution server, and transmitting connection informationof the printing apparatus to the data distribution server.

The communication channel manager may acquire information associatedwith channel establishment from a user and provide channel relatedinformation to the user. The communication channel manager may beimplemented as an application installed on a user terminal, a webapplication running on the user terminal, a user interface built in theprinting apparatus, etc.

The communication channel manager may acquire identification informationof a first apparatus, determine a second apparatus matched to the firstapparatus on the basis of the identification information of the firstapparatus, and provide connection information of the second apparatus tothe first apparatus.

The communication channel manager may acquire identification informationof a printing apparatus, determine a data distribution server matched tothe printing apparatus, and transfer connection information of the datadistribution server to the printing apparatus.

The communication channel manager may acquire identification informationof a data distribution server, determine a printing apparatus matched tothe data distribution server, and transfer connection information of theprinting apparatus to the data distribution server.

The communication channel manager may provide an interactive interface.The communication channel manager may provide an interactive interfaceand receive the identification information from a user through theinteractive interface. The interactive interface may display a messagethat requests the identification information to a user and may receivethe identification information from the user in the state of a naturallanguage in response to the displayed message. The interactive interfacemay display a result of establishing the websocket channel between theprinting apparatus and the data distribution server in response toreceiving the identification information.

The printing apparatus according to the present disclosure may beimplemented as a POS printing apparatus. Embodiments in which theprinting apparatus is a POS printing apparatus will be described belowwith reference to the drawings.

FIG. 24 shows an electronic apparatus control method according to anembodiment of the present disclosure. In this embodiment, the electronicapparatus control method may refer to a method of controlling anelectronic apparatus in order to assist in establishing a communicationchannel between a POS printing apparatus and a data server configured toprovide data to the POS printing apparatus. The electronic apparatus maybe an electronic apparatus configured to provide a communication channelmanager.

Referring to FIG. 24, the control apparatus control method according toan embodiment of the present disclosure may include acquiring, by theelectronic apparatus, unique identification information of a POSprinting apparatus (S4100), determining, by the electronic apparatus, adata server corresponding to the POS printing apparatus (S4200), andtransmitting, by the electronic apparatus, connection information of thedata server to the POS printing apparatus (S4300).

The electronic apparatus acquiring unique identification information ofa POS printing apparatus (S4100) may denote that the electronicapparatus recognizes and acquires a unique identification mark placed atthe POS printing apparatus, and the unique identification mark may be anidentification mark for identifying the POS printing apparatus using anyone of a barcode, a QR code, an RFID tag, and an NFC sensor.

The acquiring of unique identification information of a POS printingapparatus (S4100) may include acquiring unique identificationinformation of a user of the POS printing apparatus.

The acquiring of unique identification information of a POS printingapparatus (S4100) may denote providing an interactive interface andacquiring the unique identification information of the POS printingapparatus from the user of the POS printing apparatus through theinteractive interface.

The providing of the interactive interface may include displaying aquery message that requests the identification information of the POSprinting apparatus.

The acquiring of the unique identification information through theinteractive interface may denote receiving the identificationinformation of the POS printing apparatus in the state of a naturallanguage, performing syntax analysis of the received identificationinformation having the state of a natural language, and acquiring theunique identification information of the POS printing apparatus inresponse to displaying the query message to request the identificationinformation.

The electronic apparatus control method may further include displaying amessage indicating an establishment state of the websocket communicationchannel through the interactive interface in response to transmittingconnection information of the data server to the POS printing apparatus.

The electronic apparatus determining a data server corresponding to thePOS printing apparatus (S4200) may denote that the electronic apparatusdetermines a data server corresponding to the POS printing apparatususing a database configured to store connection information of at leastone data server configured to store print data interpretable by the POSprinting apparatus when connection information of the data servercorresponding to the POS printing apparatus is requested by the POSprinting apparatus.

The electronic apparatus transmitting connection information of the dataserver to the POS printing apparatus (S4300) may denote that theelectronic apparatus transmits the connection information throughBluetooth communication.

An electronic apparatus control method according to another embodimentof the present disclosure may include acquiring unique identificationinformation of a POS printing apparatus, determining a data servercorresponding to the POS printing apparatus using a database configuredto store connection information of a plurality of data serversconfigured to store print data interpretable by the POS printingapparatus wherein the connection information is required by the POSprinting apparatus to establish a websocket communication channel withthe data server, and transferring connection information of thedetermined data server to the POS printing apparatus when the connectioninformation of the data server corresponding to the POS printingapparatus is requested by the POS printing apparatus.

In this case, the unique identification information of the POS printingapparatus may be a serial number that is individually assigned to thePOS printing apparatus. The connection information of the data servermay be any one of a domain name and an IP address of the data server.The communication channel may be a websocket communication channel.

FIG. 25 shows an electronic apparatus control method according to anembodiment of the present disclosure. Referring to FIG. 25, theelectronic apparatus control method according to an embodiment of thepresent disclosure may include acquiring business provideridentification information (S4400), determining a data server (S4500),and transmitting connection information of the data server to a POSprinting apparatus (S4600).

The electronic apparatus acquiring business provider identificationinformation (S4400) may denote that the electronic apparatus acquiresbusiness provider identification information of a store in which the POSprinting apparatus is installed. The business provider identificationinformation of a store may refer to information corresponding to thestore for identifying the store. The business provider identificationinformation may be a name of a business provider or a name of a shop atwhich the POS printer apparatus is installed.

The business provider identification information may includeidentification information of a shop in which the POS printing apparatusis used, and the acquiring of the identification information of the shopmay denote providing an information request interface and receiving theidentification information from a user through the information requestinterface.

The electronic apparatus determining a data server (S4500) may denotethat the electronic apparatus determines a data server configured tostore at least one piece of order information to be transmitted to thePOS printing apparatus on the basis of the business provideridentification information when connection information of a data servermatched to the POS printing apparatus is requested by the POS printingapparatus. The order information to be transmitted to the POS printingapparatus may denote that order information corresponding to at least tothe POS printing apparatus. The order information may be correspondingto two or more POS printing apparatuses

The connection information of the data server may be connectioninformation used by the POS printing apparatus to transmit a websocketconnection handshake to the data server.

When the connection information of the data server is transmitted to thePOS printing apparatus, a websocket communication channel may beestablished between the POS printing apparatus and the data server, andorder information stored in the data server may be transmitted to thePOS printing apparatus through the websocket communication channel.

The channel connection management may include an identificationinformation input unit, a matching unit, and a communication unit.

The communication channel manager may have an identification informationinput unit to acquire identification information of a first apparatus.The identification information input unit may have a camera module torecognize an identification tag, such as a barcode and a QR code, of thefirst apparatus. The identification information input unit may have awireless communication module to identify the first apparatus through anNFC tag, RFID, Bluetooth, or the like. The identification informationinput unit may provide a user interface to acquire the identificationinformation of the first apparatus from a user.

The communication channel manager may have a matching unit and maydetermine a second apparatus matched to the first apparatus using theidentification information of the first apparatus. The matching unit mayacquire characteristic information of the first apparatus from theidentification information of the first apparatus and determine that asecond apparatus corresponding to the characteristic information of thefirst apparatus matches the first apparatus. The matching unit maydetermine the second apparatus matched to the first apparatus using adatabase, which will be described below. The matching unit may determinethat the second apparatus matches the first apparatus on basis of morethan two pieces of characteristic information of the first apparatus.

The communication channel manager may further have a memory unit. Thememory unit may store a database configured to store the identificationinformation of the first apparatus in association with identificationinformation of the second apparatus. The database may further storecommunication channel connection information of the second apparatus.The database may be a database configured to store identificationinformation of a printing apparatus and identification information of adata distribution server, which are associated with each other. Thedatabase may be a database configured to store the identificationinformation of the data distribution server and the identificationinformation of the printing apparatus, which are associated with eachother.

FIG. 26 shows a communication channel manager according to an embodimentof the present disclosure. Referring to FIG. 26, a communication channelmanager CM1 according to an embodiment of the present disclosure mayhave a first identification information input section IS1, a secondidentification information input section IS2, and a keyboard KB.

The first identification information input section IS1 may receive firstidentification information from a user. The first identificationinformation may be identification information of the user. For example,the first identification information may be identification informationof a shop corresponding to a printing apparatus (e.g., a shop where theprinting apparatus is installed), business information of a businessoffice to which the printing apparatus belongs, or the like. As shown inFIG. 26, a shop name may be received from the user.

The second identification information input section IS2 may receivesecond identification information from the user. The secondidentification information may be identification information of theprinting apparatus. For example, the second identification informationmay be a unique serial number of the printing apparatus.

The keyboard KB may be a touch keyboard configured to recognize a touchinput. The keyboard KB is not an essential element, and the presentdisclosure may be implemented differently depending on the type of anelectronic apparatus on which the communication channel manager isrunning. For example, the communication channel manager CM1 may have avoice recognition unit in place of the keyboard KB to acquire voiceinformation from the user. Alternatively, the communication channelmanager CM1 may have an image recognition unit in place of the keyboardKB to acquire an image.

FIG. 27 shows a communication channel manager according to anotherembodiment of the present disclosure. Referring to FIG. 27, acommunication channel manager CM2 according to an embodiment of thepresent disclosure may be implemented as an interactive interface. Thecommunication channel manager CM2 according to this embodiment maydisplay a query message to a user and request information needed forchannel establishment. The communication channel manager CM2 may acquirea response message from the user to acquire the information needed forchannel establishment.

As a detailed example, the communication channel manager CM2 may displaya query message M1 for requesting printing apparatus identificationinformation. The communication channel manager CM2 may acquire a messageU1 that is received from the user in response to the query message andmay acquire the printing apparatus identification information. As shownin FIG. 27, “AB_123456,” which is a serial number of the printingapparatus received from the user, may be acquired using thecommunication channel manager CM2.

The communication channel manager CM2 may display a query message M2that requests shop identification information. The communication channelmanager CM2 may acquire a message U2 received from the user in responseto the query message and may acquire the shop identificationinformation. As shown in FIG. 27, “Pizza ABC,” which is shopidentification information received from the user, may be acquiredthrough the communication channel manager CM2.

Also, when a communication channel is established between a printingapparatus and a server, the communication channel manager CM2 maydisplay a notification message M3 indicating that the communicationchannel is established.

According to this embodiment, the communication channel manager, whichprovides an interactive interface, may be used not only to acquireinformation for establishing a communication channel from as user, asdescribed above, but also to give and take information to and from auser. For example, the communication channel manager may also be used tocontrol a server apparatus, a printing apparatus, or the like or acquirestate information from a user.

The above embodiments of the communication channel manager are merely anexample. Accordingly, an element, such as an input section, of thecommunication channel manager may change, and it will be appreciatedthat modification of the embodiments can be easily made by those skilledin the art.

4.2.3.2 Operation of Server Apparatus

A server apparatus may control establishment of a communication channel.The server apparatus may provide connection information of the serverapparatus to an external apparatus and establish a data communicationchannel with a receiving apparatus matched by the external apparatus.The server apparatus may provide identification information of theserver apparatus to the external apparatus and establish a datacommunication channel with a receiving apparatus matched on the basis ofthe identification information.

The server apparatus may provide an application for managingestablishment of a communication channel. The server apparatus mayprovide the application, acquire identification information of areceiving terminal through the application, acquire connectioninformation of a data server apparatus matched to the receivingterminal, and transmit the connection information of the data serverapparatus to the receiving terminal. In this case, the server apparatusthat provides the application may be a data server apparatus matched tothe receiving terminal.

The server apparatus may provide the application, provide theidentification information of the server apparatus through theapplication, acquire connection information of a receiving terminalmatched to the server apparatus, and establish a communication channelwith the receiving terminal.

The server apparatus may have a communication unit, a database unit, anda control unit.

The server apparatus may have the communication unit to acquireidentification information or connection information of a receivingapparatus from an external apparatus. The server apparatus may transmitidentification information or connection information of the serverapparatus to the external apparatus by means of the communication unit.

The server apparatus may have the database unit to store a databasestoring the identification information of the receiving apparatus andthe connection information of the server apparatus, which are associatedwith each other. The database unit may store a database storing theidentification information of the server apparatus and the connectioninformation of the receiving apparatus, which are associated with eachother.

The server apparatus may have the control unit to control theabove-described establishment of the communication channel.

The server apparatus may further have a channel management unit. Thechannel management unit may store the above-described channelapplication and manage the communication channel. The channel managementunit may include a user interface used to manage the communicationchannel and provide the user interface to a user terminal through thecommunication unit.

4.2.3.3 Operation of Printing Apparatus

A printing apparatus may control establishment of a communicationchannel. The printing apparatus may provide identification informationof the printing apparatus to an external apparatus and establish a datacommunication channel with a server apparatus matched on the basis ofthe identification information. The printing apparatus may provideconnection information of the printing apparatus to the externalapparatus and establish a data communication channel with a serverapparatus matched to the external apparatus.

The printing apparatus may include a communication unit, a memory unit,a printing unit, and a control unit.

The printing apparatus may have the communication unit to communicatewith an external apparatus. The printing apparatus may have thecommunication unit to acquire identification information or connectioninformation of the external apparatus from the outside. The printingapparatus may transmit the identification information or the connectioninformation of the printing apparatus to the external apparatus by meansof the communication unit.

The printing apparatus may have the memory unit.

The memory unit may store a database. The database may be a databaseconfigured to store the identification information of the printingapparatus and the identification information of the server apparatus,which are associated with each other.

The memory unit may store a channel management application. The printingapparatus may provide an application, acquire the identificationinformation of the printing apparatus through the application, acquirethe connection information of the server apparatus, and establish a datacommunication channel with the server apparatus.

The printing apparatus may provide an application, acquire theidentification information of the server apparatus through theapplication, provide the connection information of the printingapparatus, and establish a data communication channel with the serverapparatus.

The printing apparatus may have the printing unit to perform a printingoperation on the basis of print data acquired through the communicationchannel.

The printing apparatus may have the control unit. The printing apparatusmay perform an operation of controlling the above-describedestablishment of the communication channel by means of the communicationunit.

The printing apparatus may provide a user interface.

The printing apparatus may use the user interface to request informationrequired to establish the communication channel from a user.

The printing apparatus may use the user interface to acquire uniqueidentification information of the printing apparatus. The printingapparatus may use the user interface to acquire reference informationfor determining a server apparatus matched to the printing apparatus.For example, the printing apparatus may use the user interface toacquire business provider identification information or the like of asales store to which the printer apparatus belongs.

The printing apparatus may use the user interface to display a status ofthe establishment of the communication channel to a user. The userinterface may provide a result of establishing the communicationchannel, whether the establishment is interrupted, or the like to auser.

4.2.4 Embodiments

A method of establishing a communication channel between a printingapparatus and a server apparatus according to some embodiments of thepresent disclosure will be described below.

According to an embodiment of the present disclosure, a method ofestablishing a communication channel between a printing apparatus and aserver apparatus may include storing, by a channel managementapplication, identification information of the server apparatus,acquiring, by the channel management application, identificationinformation of the printing apparatus, and transferring, by the channelmanagement application, identification information of a printingapparatus corresponding to the server apparatus to the server apparatususing the identification information of the printing apparatus and theidentification information of the server apparatus. In this case, whenthe identification information of the printing apparatus is transferredto the server apparatus, the server apparatus may establish acommunication channel with the printing apparatus.

The acquiring of identification information of the printing apparatusmay be performed by recognizing an identification mark, such as abarcode and a photo, attached to the printing apparatus by means of acamera module of a terminal on which the application is installed. Theacquiring of identification information of the printing apparatus mayinclude acquiring shop identification information of a shop at which theprinting apparatus is installed. The acquiring of shop identificationinformation may denote receiving a name of the shop from the userthrough a user interface of the application.

According to another embodiment of the present disclosure, a method ofestablishing a communication channel between a printing apparatus and aserver apparatus may include acquiring, by a channel managementapplication, information of the server apparatus that is acquired usinga manager application, transmitted to a manager server, and transmittedby the manager server, storing, by the channel management application,the information of the server apparatus, acquiring, by the channelmanagement application, user input information from a user, andtransmitting, by the channel management application, information of theserver apparatus corresponding to the user input information to theprinting apparatus.

The manager application may be executed by a manager who manages theserver application. The information of the server apparatus acquiredthrough the manager application may be identification information of themanager who manages the server apparatus, a domain name of the serverapparatus, an IP address of the server apparatus, or the like.

The user input information may include shop identification information,manager identification information, printing apparatus identificationinformation, etc.

The method of establishing a communication channel may further includetransmitting, by the printing apparatus, a message indicating that thecommunication channel is established to the channel managementapplication when the communication channel is established between theprinting apparatus and the server apparatus.

According to still another embodiment of the present disclosure, amethod of establishing a communication channel between a printingapparatus and a server apparatus may include acquiring, by a channelmanagement application, connection information of the server apparatusand manager information of a manager associated with the serverapparatus, acquiring, by the channel management application,identification information of a printing apparatus attempting to connectto the server apparatus and identification information of a user whouses the printing apparatus, transmitting, by the channel managementapplication, the connection information of the server apparatus and themanager information to the printing apparatus, and receiving, by thechannel management application, a notification indicating that thecommunication channel is established between the printing apparatus andthe server apparatus from the printing apparatus.

The channel management application acquiring the connection informationof the server apparatus and the manager information may denote that thechannel management application acquires the connection information andthe manager information from a database prestored in the channelmanagement application.

The communication channel establishment method according to the presentdisclosure is not limited to the above embodiments, and variousembodiments may be implemented to assist in establishing a websocketchannel between the server apparatus that transmit the data and theprinting apparatus.

4.3 Control Tool

The control tool that has been described with regard to the firstprinting process may also be implemented for the second printingprocess. Specifically, the apparatus control method using the controltool may also be applied to the third system including a user terminal,a data distribution server, and a printing apparatus.

An apparatus control method according to an embodiment of the presentdisclosure may include acquiring, by a user terminal, a control tool forcontrolling a printing apparatus, establishing a websocket communicationchannel between the user terminal and the printing apparatus, andcontrolling, by the user terminal, the printing apparatus using thecontrol tool and the websocket communication channel.

The user terminal acquiring a control tool may denote that the userterminal acquires a control tool provided by a data distribution server.The acquiring of the control tool may denote acquiring a control toolprovided by the data distribution server using a web browser running onthe user terminal.

The establishing of a websocket communication channel between the userterminal and the printing apparatus may include a case in which thewebsocket communication channel is established between the user terminaland the data distribution server and the printing apparatus is networkedto the data distribution server and a case in which the websocketcommunication channel is established between the data distributionserver and the printing apparatus and the user terminal is networked tothe data distribution server. The websocket communication channel may besimultaneously established between the user terminal and the datadistribution server and between the data distribution server and theprinting apparatus.

The user terminal controlling the printing apparatus using the controltool and the websocket communication channel includes the user terminalacquiring registration information for identifying and managing theprinting apparatus and providing the acquired registration informationto the data distribution server.

The apparatus management method using the control tool may also beapplied to the fourth system including a user terminal, a datadistribution server, a hub printing apparatus, and a peripheralapparatus connected to the hub printing apparatus.

An apparatus control method according to an embodiment of the presentdisclosure may include acquiring, by a user terminal, a control tool forcontrolling a printing apparatus, establishing a websocket communicationchannel between the user terminal and the printing apparatus, andcontrolling, by the user terminal, a peripheral apparatus connected tothe printing apparatus using the control tool and the websocketcommunication channel.

The user terminal controlling a peripheral apparatus includes providingregistration information for controlling the peripheral apparatus andtransmitting control data for controlling operation of the peripheralapparatus.

As a detailed example, the apparatus management method using the controltool may include activating, by the printing apparatus, the datadistribution server and a printing mode corresponding to a secondprocess and providing, by the data distribution server, a control toolfor a peripheral apparatus to the user terminal when a websocketcommunication channel is established between the printing apparatus andthe data distribution server. When the user terminal acquires thecontrol tool, the user terminal may transmit a websocket handshake tothe data distribution server and may establish a websocket communicationchannel with the data distribution server when a handshake response isreceived from the data distribution server.

In this case, the user terminal may provide identification informationof the printing apparatus and registration information (or controlinformation) for controlling the peripheral information to the datadistribution server. The printing apparatus may acquire the registrationinformation and register and control the peripheral apparatus on thebasis of the registration information of the peripheral apparatus.

The printing apparatus may register the peripheral apparatus andtransmit a notification message indicating a registration status of theperipheral apparatus to the data distribution server. The datadistribution server may transmit the notification message to the userterminal.

5. Complex Embodiment

The above-described first printing process and second printing processmay not be independently performed. Both of the first printing processand the second printing process may be initiated by a single relevantsystem. Also, the data or communication channel management methodsdescribed with regard to the first printing process and the data orcommunication channel management methods described with regard to thesecond printing process may be performed together.

Some embodiments in which the spirits that have been described withregard to the system encompassing the first process and the secondprocess and with regard to the first process and the second process areimplemented in a complex manner will be described below.

5.1 Fifth System

FIG. 28 shows a printing system according to an embodiment of thepresent disclosure. Referring to FIG. 28, a printing system according toan embodiment of the present disclosure may include a plurality of userterminals, at least one data distribution server 500, a plurality ofprinting apparatus 600, a plurality of external control apparatuses 100,and a plurality of peripheral apparatuses 300.

In this case, a printing apparatus 900, which is at least one of theplurality of printing apparatuses, may be connected to both of the datadistribution server 500 and the external control apparatus 100.

A printing apparatus connected to both of the data distribution server500 and the external control apparatus 100 is hereinafter referred to asa complex printing apparatus. In other words, the complex printingapparatus 900 may be understood as a printing apparatus havingattributes of both of the printing apparatus 200 corresponding to theabove-described first printing process and the printing apparatus 600corresponding to the above-described second printing process.

The complex printing apparatus 900 may establish a websocket channelwith the external control apparatus 100 and may acquire print data fromthe external control apparatus 100 through the websocket channel. Adetailed process may be performed as described above with regard to thefirst printing process.

The complex printing apparatus 900 may establish a websocket channelwith the data distribution server 500 and may acquire print data throughthe websocket channel. A detailed process thereof may be performed asdescribed above with regard to the second printing process.

When the data is acquired from the external control apparatus 100 andthe data distribution server 500, it is difficult for the complexprinting apparatus 900 to process the data acquired from the externalcontrol apparatus 100 and the data distribution server 500. The complexprinting apparatus 900 may set priorities for the data acquired from theexternal control apparatus 100 and the data distribution server 500before handling the data. The complex printing apparatus 900 may handlethe acquired data differently depending on apparatuses by which the dataare to be received. The complex printing apparatus 900 may handle theacquired data in order of time received, regardless of the apparatusesby which the data are to be received. The complex printing apparatus 900may determine a destination of the acquired data to be differentdepending on the apparatuses by which the data are to be received. Forexample, the complex printing apparatus 900 may transmit the dataacquired from the external control apparatus 100 to a first peripheralapparatus 301 and may transmit the data acquired from the datadistribution server 500 to a second peripheral apparatus 302. Morespecifically, the complex printing apparatus 900 may transmit dataacquired from a first external control apparatus 101 to the firstperipheral apparatus 301 and may transmit data transmitted from a firstuser terminal 401 via the data distribution server 500 to a thirdperipheral apparatus 303.

According to the present disclosure, it is possible to efficientlyoperate a websocket communication channel.

According to the present disclosure, it is possible to reduce resourcesrequired for communication of print data.

According to the present disclosure, it is possible to efficientlyoperate a space for storing received data.

The advantageous effects of the present disclosure are not limited tothe aforementioned advantageous effects, and other advantageous effectswhich are not described herein should be clearly understood by thoseskilled in the art from the following detailed description and theaccompanying drawings.

The above description is merely illustrative of the technical spirit ofthe present disclosure, various modifications and changes may be made bythose skilled in the art without departing from the subject matter ofthe present disclosure. Accordingly, the above-described embodiments ofthe present disclosure may be implemented separately or in combination.

Therefore, the embodiments disclosed herein are intended not to limitbut to describe the technical spirit of the present disclosure, and thescope of the present disclosure is not limited to the embodiments. Thescope of the invention should be construed by the appended claims, andall technical sprits within the scope of their equivalents should beconstrued as included in the scope of the invention.

What is claimed is:
 1. A printing method performed by a printingapparatus connected with an external apparatus storing print datathrough a network, the printing method comprises: transmitting ahandshake request message or a handshake response message to theexternal apparatus for establishing a websocket communication channelfor communicating with the external apparatus; transmitting a print datarequest message to the external apparatus for receiving the print data;acquiring the print data from the external apparatus through thewebsocket communication channel in response to the print data requestmessage; performing a printing operation on the basis of the acquiredprint data; determining whether a predetermined time period has elapsedsince completion of acquisition of the print data; and transmitting aclosure request message to the external apparatus to close the websocketcommunication channel responsive to determining that the predeterminedtime period has elapsed since the completion of acquisition of the printdata and independent of performance of the printing operation when theprint data is acquired, wherein the print data is written in a formatprocessible by the printing apparatus without a format conversionprocedure, and wherein the closure request message is not transmitted tothe external apparatus if the predetermined time period has not elapsedsince completion of acquisition of the print data.
 2. The printingmethod of claim 1, wherein the transmitting the print data requestmessage comprises transmitting the print data request message aftertransmitting state information of the printing apparatus in response tothe external apparatus requesting the state information.
 3. The printingmethod of claim 1, wherein: the transmitting the print data requestmessage comprises transmitting state information of the printingapparatus; and the state information indicates status information for atleast one requirement for performing a printing operation.
 4. Theprinting method of claim 3, wherein the print data request message istransmitted through the websocket communication channel.
 5. The printingmethod of claim 1, wherein the format processible by the printingapparatus is a command format that is specific to the printing apparatusto control the printing apparatus.
 6. The printing method of claim 1,wherein the web-socket communication channel comprises a firstweb-socket communication channel for transmitting the print data and asecond web-socket communication channel for transmitting the print datarequest message, wherein the transmitting the closure request messagecomprises: transmitting a second closure request message for closing thesecond web-socket communication channel after transmitting the printdata request message; and transmitting a first closure request messagefor closing the first web-socket communication channel when thepredetermined time period has elapsed after the transmission of theprint data request message or when the print data is acquired.
 7. Amanagement method for a websocket communication channel performed by aprinting apparatus, the management method comprising: transmitting ahandshake request message or a handshake response message to an externalapparatus for establishing the websocket communication channel forcommunicating with the external apparatus; transmitting a print datarequest message for receiving print data for performing a printingoperation to the external apparatus through the websocket communicationchannel; determining that a certain time has elapsed after thetransmission of the print data request message without receiving therequested print data; and transmitting a closure request message to theexternal apparatus to close the websocket communication channel afterthe transmission of the print data request message is complete inresponse to the determining that the certain time has elapsed after thetransmission of the print data request message without receiving therequested print data.
 8. A printing apparatus connected with an externalapparatus storing print data through the network, the printing apparatuscomprising: a communication unit configured to perform datacommunication with the external apparatus; a printing unit configured toperform a printing operation; and a control unit configured to transmita handshake request message or a handshake response message to theexternal apparatus for establishing a first websocket communicationchannel with the external apparatus by means of the communication unit,transmit a print data request message for receiving the print data tothe external apparatus through the first websocket communication channelby means of the communication unit, acquire the print data from theexternal apparatus through the first duplex asynchronous communicationchannel in response to the request the print data by means of thecommunication unit, perform the printing operation on the basis of theacquired print data by means of the printing unit, determine whether apredetermined time period has elapsed since completion of acquisition ofthe print data; and transmit a closure request message to the externalapparatus to close the websocket communication channel responsive to adetermination that the predetermined time period has elapsed since thecompletion of acquisition of the print data and independent ofperformance of the printing operation when the print data is acquired,wherein the print data is written in a format processible by theprinting apparatus without a format conversion procedure.
 9. Theprinting apparatus of claim 8, wherein when the control unit transmitsthe data request message, the control unit acquires an event thatrequests state information of the printing apparatus from the externalapparatus by means of the communication unit and transmits the datarequest message including the state information of the printingapparatus in response to the event requesting the state information. 10.The printing apparatus of claim 8, wherein the control unit establishesa second websocket communication channel with the external apparatus bymeans of the communication unit and acquires control data other than theprint data as data for controlling a state of the printing apparatusthrough the second web socket communication channel.